diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Dark.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Dark.xaml
index 870c7365dbd..bb23254e585 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Dark.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Dark.xaml
@@ -315,9 +315,9 @@
     <SolidColorBrush x:Key="BreadcrumbBarCurrentNormalForegroundBrush" Color="{StaticResource TextFillColorPrimary}" />
 
     <!--  Button  -->
-    <SolidColorBrush x:Key="AccentButtonBackground" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="AccentButtonBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-    <SolidColorBrush x:Key="AccentButtonBackgroundPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+    <SolidColorBrush x:Key="AccentButtonBackground" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="AccentButtonBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+    <SolidColorBrush x:Key="AccentButtonBackgroundPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
     <!--<SolidColorBrush x:Key="AccentButtonBackgroundDisabled" ResourceKey="AccentFillColorDisabledBrush" />-->
     <SolidColorBrush x:Key="AccentButtonForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
     <SolidColorBrush x:Key="AccentButtonForegroundPointerOver" Color="{StaticResource TextOnAccentFillColorPrimary}" />
@@ -345,9 +345,9 @@
     <SolidColorBrush x:Key="CalendarViewBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
     <SolidColorBrush x:Key="CalendarViewBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
     <SolidColorBrush x:Key="CalendarViewItemBackgroundPointerOver" Color="{StaticResource ControlFillColorSecondary}" />
-    <SolidColorBrush x:Key="CalendarViewSelectedBackground" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="CalendarViewSelectedBorderBrush" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="CalendarViewTodayBackground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="CalendarViewSelectedBackground" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="CalendarViewSelectedBorderBrush" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="CalendarViewTodayBackground" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="CalendarViewTodayForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
     <SolidColorBrush x:Key="CalendarViewButtonForeground" Color="{StaticResource TextFillColorSecondary}" />
 
@@ -373,9 +373,9 @@
     <SolidColorBrush x:Key="CheckBoxCheckBorderBrush" Color="{StaticResource SubtleFillColorTransparent}" />
     <SolidColorBrush x:Key="CheckBoxCheckGlyphForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
     <SolidColorBrush x:Key="CheckBoxCheckGlyphForegroundPressed" Color="{StaticResource TextOnAccentFillColorSecondary}" />
-    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillChecked" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillChecked" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+    <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
     <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillUncheckedPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
     <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillUncheckedPressed" Color="{StaticResource ControlAltFillColorQuarternary}" />
     <SolidColorBrush x:Key="CheckBoxCheckBorderBrushUncheckedPressed" Color="{StaticResource SubtleFillColorTransparent}" />
@@ -395,11 +395,11 @@
     <SolidColorBrush x:Key="ComboBoxForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
     <!--<SolidColorBrush x:Key="ComboBoxItemBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
     <SolidColorBrush x:Key="ComboBoxBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
-    <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ComboBoxDropDownGlyphForeground" Color="{StaticResource TextFillColorSecondary}" />
     <SolidColorBrush x:Key="ComboBoxDropDownBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
     <SolidColorBrush x:Key="ComboBoxDropDownBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
-    <SolidColorBrush x:Key="ComboBoxItemPillFillBrush" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ComboBoxItemPillFillBrush" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ComboBoxItemBackgroundSelected" Color="{StaticResource SubtleFillColorSecondary}" />
     <SolidColorBrush x:Key="ComboBoxItemForeground" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="ComboBoxItemForegroundSelected" Color="{StaticResource TextFillColorPrimary}" />
@@ -450,7 +450,7 @@
     <SolidColorBrush x:Key="HyperlinkButtonBackgroundDisabled" Color="{StaticResource SubtleFillColorDisabled}" />
     <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorLight3}" />
     <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-    <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+    <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
     <SolidColorBrush x:Key="HyperlinkButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
 
     <!--  InfoBadge  -->
@@ -468,7 +468,7 @@
     <SolidColorBrush x:Key="InfoBarErrorSeverityIconBackground" Color="{StaticResource SystemFillColorCritical}" />
     <SolidColorBrush x:Key="InfoBarWarningSeverityIconBackground" Color="{StaticResource SystemFillColorCaution}" />
     <SolidColorBrush x:Key="InfoBarSuccessSeverityIconBackground" Color="{StaticResource SystemFillColorSuccess}" />
-    <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColor}" />
 
     <!--  Label  -->
     <SolidColorBrush x:Key="LabelForeground" Color="{StaticResource TextFillColorSecondary}" />
@@ -484,7 +484,7 @@
 
     <!--  ListView  -->
     <SolidColorBrush x:Key="ListViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
-    <SolidColorBrush x:Key="ListViewItemPillFillBrush" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ListViewItemPillFillBrush" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ListViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
 
     <!--  LoadingScreen  -->
@@ -508,7 +508,7 @@
     <SolidColorBrush x:Key="NavigationViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="NavigationViewItemForegroundPointerOver" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="NavigationViewItemForegroundPressed" Color="{StaticResource TextFillColorSecondary}" />
-    <SolidColorBrush x:Key="NavigationViewSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="NavigationViewSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="NavigationViewItemSeparatorForeground" Color="{StaticResource DividerStrokeColorDefault}" />
     <SolidColorBrush x:Key="NavigationViewItemBackground" Color="{StaticResource SubtleFillColorTransparent}" />
     <SolidColorBrush x:Key="NavigationViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
@@ -524,26 +524,26 @@
     <SolidColorBrush x:Key="NavigationViewItemForegroundPointerOverLeftFluent" Color="{StaticResource TextFillColorPrimary}" />
 
     <!--  ProgressBar  -->
-    <SolidColorBrush x:Key="ProgressBarForeground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ProgressBarForeground" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ProgressBarBackground" Color="{StaticResource ControlStrongStrokeColorDefault}" />
     <SolidColorBrush x:Key="ProgressBarBorderBrush" Color="{StaticResource ControlStrokeColorDefault}" />
     <SolidColorBrush x:Key="ProgressBarIndeterminateBackground" Color="{DynamicResource ControlFillColorTransparent}" />
     <SolidColorBrush x:Key="ProgressBarIndeterminateBorderBrush" Color="{DynamicResource ControlFillColorTransparent}" />
 
     <!--  ProgressRing  -->
-    <SolidColorBrush x:Key="ProgressRingForegroundThemeBrush" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ProgressRingForegroundThemeBrush" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ProgressRingBackgroundThemeBrush" Color="{StaticResource ControlFillColorTransparent}" />
 
     <!--  RadioButton  -->
     <SolidColorBrush x:Key="RadioButtonForeground" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="RadioButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
     <SolidColorBrush x:Key="RadioButtonBackgroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
-    <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStroke" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStrokePointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+    <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStroke" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStrokePointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
     <SolidColorBrush x:Key="RadioButtonCheckGlyphFill" Color="{StaticResource TextOnAccentFillColorPrimary}" />
-    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedStrokePressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
-    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedStrokePressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
+    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+    <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
     <SolidColorBrush x:Key="RadioButtonOuterEllipseFill" Color="{StaticResource ControlAltFillColorSecondary}" />
     <SolidColorBrush x:Key="RadioButtonOuterEllipseFillPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
     <SolidColorBrush x:Key="RadioButtonOuterEllipseFillPressed" Color="{StaticResource ControlAltFillColorQuarternary}" />
@@ -553,7 +553,7 @@
     <SolidColorBrush x:Key="RadioButtonOuterEllipseStrokeDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
 
     <!--  RatingControl  -->
-    <SolidColorBrush x:Key="RatingControlSelectedForeground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="RatingControlSelectedForeground" Color="{StaticResource SystemAccentColorLight2}" />
 
     <!-- RepeatButton -->
     <SolidColorBrush x:Key="RepeatButtonBackground" Color="{StaticResource ControlFillColorDefault}" />
@@ -574,8 +574,8 @@
     <SolidColorBrush x:Key="SliderTrackFillPointerOver" Color="{StaticResource ControlStrongFillColorDefault}" />
     <SolidColorBrush x:Key="SliderTickBarFill" Color="{StaticResource ControlStrongFillColorDefault}" />
     <SolidColorBrush x:Key="SliderOuterThumbBackground" Color="{StaticResource ControlSolidFillColorDefault}" />
-    <SolidColorBrush x:Key="SliderThumbBackground" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="SliderThumbBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+    <SolidColorBrush x:Key="SliderThumbBackground" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="SliderThumbBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
 
     <!--  SnackBar  -->
     <SolidColorBrush x:Key="SnackBarBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
@@ -602,7 +602,7 @@
     <!--<SolidColorBrush x:Key="TextControlBorderBrush" Color="{StaticResource TextControlElevationBorderBrush}" />-->
     <SolidColorBrush x:Key="TextControlForeground" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="TextControlForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
-    <SolidColorBrush x:Key="TextControlFocusedBorderBrush" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="TextControlFocusedBorderBrush" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="TextControlBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
     <SolidColorBrush x:Key="TextControlPlaceholderForeground" Color="{StaticResource TextFillColorSecondary}" />
     <SolidColorBrush x:Key="TextControlButtonForeground" Color="{StaticResource TextFillColorSecondary}" />
@@ -628,9 +628,9 @@
     <SolidColorBrush x:Key="ToggleButtonBackgroundPointerOver" Color="{StaticResource ControlFillColorSecondary}" />
     <SolidColorBrush x:Key="ToggleButtonBackgroundPressed" Color="{StaticResource ControlFillColorTertiary}" />
     <SolidColorBrush x:Key="ToggleButtonBackgroundDisabled" Color="{StaticResource ControlFillColorDisabled}" />
-    <SolidColorBrush x:Key="ToggleButtonBackgroundChecked" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-    <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+    <SolidColorBrush x:Key="ToggleButtonBackgroundChecked" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+    <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
     <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedDisabled" Color="{StaticResource AccentFillColorDisabled}" />
     <!--<SolidColorBrush x:Key="ToggleButtonBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
     <SolidColorBrush x:Key="ToggleButtonBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
@@ -650,11 +650,11 @@
     <SolidColorBrush x:Key="ToggleSwitchStrokeOff" Color="{StaticResource ControlStrongStrokeColorDefault}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOffPointerOver" Color="{StaticResource ControlStrongStrokeColorDefault}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOffDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
-    <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorLight2}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
-    <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorLight3}" />
-    <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+    <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorLight2}" />
+    <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
     <SolidColorBrush x:Key="ToggleSwitchFillOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
     <SolidColorBrush x:Key="ToggleSwitchFillOff" Color="{StaticResource ControlAltFillColorSecondary}" />
     <SolidColorBrush x:Key="ToggleSwitchFillOffPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
@@ -684,5 +684,5 @@
     <SolidColorBrush x:Key="TreeViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
     <SolidColorBrush x:Key="TreeViewItemBackgroundSelected" Color="{StaticResource SubtleFillColorSecondary}" />
     <SolidColorBrush x:Key="TreeViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
-    <SolidColorBrush x:Key="TreeViewItemSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight3}" />
+    <SolidColorBrush x:Key="TreeViewItemSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight2}" />
 </ResourceDictionary>
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/HC.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/HC.xaml
index 521942f2314..ff6260da4c5 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/HC.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/HC.xaml
@@ -476,9 +476,6 @@
     <SolidColorBrush x:Key="TextControlPlaceholderForeground" Color="{StaticResource SystemColorGrayTextColor}" />
     <SolidColorBrush x:Key="TextControlButtonForeground" Color="{StaticResource SystemColorWindowTextColor}" />
 
-    <!--  ThumbRate  -->
-    <SolidColorBrush x:Key="ThumbRateForeground" Color="{StaticResource SystemColorHighlightColor}" />
-
     <!--  TimePicker  -->
     <SolidColorBrush x:Key="TimePickerButtonBackground" Color="{StaticResource SystemColorWindowColor}" />
     <SolidColorBrush x:Key="TimePickerButtonBackgroundPointerOver" Color="{StaticResource SystemColorHighlightTextColor}" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Light.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Light.xaml
index ddb196b5338..7b7a0c4f07a 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Light.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Resources/Theme/Light.xaml
@@ -389,7 +389,7 @@
     <SolidColorBrush x:Key="ComboBoxForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
     <!--<SolidColorBrush x:Key="ComboBoxItemBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
     <SolidColorBrush x:Key="ComboBoxBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
-    <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorDark2}" />
+    <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorDark1}" />
     <SolidColorBrush x:Key="ComboBoxDropDownGlyphForeground" Color="{StaticResource TextFillColorPrimary}" />
     <SolidColorBrush x:Key="ComboBoxDropDownBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
     <SolidColorBrush x:Key="ComboBoxDropDownBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
@@ -442,8 +442,8 @@
     <SolidColorBrush x:Key="HyperlinkButtonBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
     <SolidColorBrush x:Key="HyperlinkButtonBackgroundPressed" Color="{StaticResource SubtleFillColorTertiary}" />
     <SolidColorBrush x:Key="HyperlinkButtonBackgroundDisabled" Color="{StaticResource SubtleFillColorDisabled}" />
-    <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorDark1}" />
-    <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.9" />
+    <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorDark2}" />
+    <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorDark3}" Opacity="0.9" />
     <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.8" />
     <SolidColorBrush x:Key="HyperlinkButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
 
@@ -462,7 +462,7 @@
     <SolidColorBrush x:Key="InfoBarErrorSeverityIconBackground" Color="{StaticResource SystemFillColorCritical}" />
     <SolidColorBrush x:Key="InfoBarWarningSeverityIconBackground" Color="{StaticResource SystemFillColorCaution}" />
     <SolidColorBrush x:Key="InfoBarSuccessSeverityIconBackground" Color="{StaticResource SystemFillColorSuccess}" />
-    <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColorDark1}" />
+    <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColor}" />
 
     <!--  Label  -->
     <SolidColorBrush x:Key="LabelForeground" Color="{StaticResource TextFillColorSecondary}" />
@@ -646,7 +646,7 @@
     <SolidColorBrush x:Key="ToggleSwitchStrokeOffPointerOver" Color="{StaticResource ControlStrongStrokeColorDefault}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOffDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorDark1}" />
-    <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorDark2}" />
+    <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorDark1}" />
     <SolidColorBrush x:Key="ToggleSwitchStrokeOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
     <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorDark1}" />
     <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.9" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
index 1dee0fa6dd7..0f283983b28 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
@@ -316,9 +316,9 @@
   <SolidColorBrush x:Key="BreadcrumbBarHoverForegroundBrush" Color="{StaticResource TextFillColorSecondary}" />
   <SolidColorBrush x:Key="BreadcrumbBarCurrentNormalForegroundBrush" Color="{StaticResource TextFillColorPrimary}" />
   <!--  Button  -->
-  <SolidColorBrush x:Key="AccentButtonBackground" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="AccentButtonBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-  <SolidColorBrush x:Key="AccentButtonBackgroundPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+  <SolidColorBrush x:Key="AccentButtonBackground" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="AccentButtonBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+  <SolidColorBrush x:Key="AccentButtonBackgroundPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
   <!--<SolidColorBrush x:Key="AccentButtonBackgroundDisabled" ResourceKey="AccentFillColorDisabledBrush" />-->
   <SolidColorBrush x:Key="AccentButtonForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
   <SolidColorBrush x:Key="AccentButtonForegroundPointerOver" Color="{StaticResource TextOnAccentFillColorPrimary}" />
@@ -345,9 +345,9 @@
   <SolidColorBrush x:Key="CalendarViewBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
   <SolidColorBrush x:Key="CalendarViewBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
   <SolidColorBrush x:Key="CalendarViewItemBackgroundPointerOver" Color="{StaticResource ControlFillColorSecondary}" />
-  <SolidColorBrush x:Key="CalendarViewSelectedBackground" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="CalendarViewSelectedBorderBrush" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="CalendarViewTodayBackground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="CalendarViewSelectedBackground" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="CalendarViewSelectedBorderBrush" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="CalendarViewTodayBackground" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="CalendarViewTodayForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
   <SolidColorBrush x:Key="CalendarViewButtonForeground" Color="{StaticResource TextFillColorSecondary}" />
   <!--  Card / CardAction / CardColor / CardExpander  -->
@@ -371,9 +371,9 @@
   <SolidColorBrush x:Key="CheckBoxCheckBorderBrush" Color="{StaticResource SubtleFillColorTransparent}" />
   <SolidColorBrush x:Key="CheckBoxCheckGlyphForeground" Color="{StaticResource TextOnAccentFillColorPrimary}" />
   <SolidColorBrush x:Key="CheckBoxCheckGlyphForegroundPressed" Color="{StaticResource TextOnAccentFillColorSecondary}" />
-  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillChecked" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillChecked" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+  <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillCheckedPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
   <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillUncheckedPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
   <SolidColorBrush x:Key="CheckBoxCheckBackgroundFillUncheckedPressed" Color="{StaticResource ControlAltFillColorQuarternary}" />
   <SolidColorBrush x:Key="CheckBoxCheckBorderBrushUncheckedPressed" Color="{StaticResource SubtleFillColorTransparent}" />
@@ -391,11 +391,11 @@
   <SolidColorBrush x:Key="ComboBoxForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
   <!--<SolidColorBrush x:Key="ComboBoxItemBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
   <SolidColorBrush x:Key="ComboBoxBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
-  <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ComboBoxDropDownGlyphForeground" Color="{StaticResource TextFillColorSecondary}" />
   <SolidColorBrush x:Key="ComboBoxDropDownBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
   <SolidColorBrush x:Key="ComboBoxDropDownBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
-  <SolidColorBrush x:Key="ComboBoxItemPillFillBrush" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ComboBoxItemPillFillBrush" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ComboBoxItemBackgroundSelected" Color="{StaticResource SubtleFillColorSecondary}" />
   <SolidColorBrush x:Key="ComboBoxItemForeground" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="ComboBoxItemForegroundSelected" Color="{StaticResource TextFillColorPrimary}" />
@@ -438,7 +438,7 @@
   <SolidColorBrush x:Key="HyperlinkButtonBackgroundDisabled" Color="{StaticResource SubtleFillColorDisabled}" />
   <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorLight3}" />
   <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-  <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+  <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
   <SolidColorBrush x:Key="HyperlinkButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
   <!--  InfoBadge  -->
   <!--  TODO  -->
@@ -452,7 +452,7 @@
   <SolidColorBrush x:Key="InfoBarErrorSeverityIconBackground" Color="{StaticResource SystemFillColorCritical}" />
   <SolidColorBrush x:Key="InfoBarWarningSeverityIconBackground" Color="{StaticResource SystemFillColorCaution}" />
   <SolidColorBrush x:Key="InfoBarSuccessSeverityIconBackground" Color="{StaticResource SystemFillColorSuccess}" />
-  <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColor}" />
   <!--  Label  -->
   <SolidColorBrush x:Key="LabelForeground" Color="{StaticResource TextFillColorSecondary}" />
   <!--  ListBox  -->
@@ -465,7 +465,7 @@
   <SolidColorBrush x:Key="ListBoxItemUnselectedBackgroundPointerOverThemeBrush" Color="{StaticResource ControlAltFillColorTertiary}" />
   <!--  ListView  -->
   <SolidColorBrush x:Key="ListViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
-  <SolidColorBrush x:Key="ListViewItemPillFillBrush" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ListViewItemPillFillBrush" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ListViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
   <!--  LoadingScreen  -->
   <SolidColorBrush x:Key="LoadingScreenBackground" Color="{StaticResource ApplicationBackgroundColor}" />
@@ -485,7 +485,7 @@
   <SolidColorBrush x:Key="NavigationViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="NavigationViewItemForegroundPointerOver" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="NavigationViewItemForegroundPressed" Color="{StaticResource TextFillColorSecondary}" />
-  <SolidColorBrush x:Key="NavigationViewSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="NavigationViewSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="NavigationViewItemSeparatorForeground" Color="{StaticResource DividerStrokeColorDefault}" />
   <SolidColorBrush x:Key="NavigationViewItemBackground" Color="{StaticResource SubtleFillColorTransparent}" />
   <SolidColorBrush x:Key="NavigationViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
@@ -498,24 +498,24 @@
   <SolidColorBrush x:Key="NavigationViewItemForegroundLeftFluent" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="NavigationViewItemForegroundPointerOverLeftFluent" Color="{StaticResource TextFillColorPrimary}" />
   <!--  ProgressBar  -->
-  <SolidColorBrush x:Key="ProgressBarForeground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ProgressBarForeground" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ProgressBarBackground" Color="{StaticResource ControlStrongStrokeColorDefault}" />
   <SolidColorBrush x:Key="ProgressBarBorderBrush" Color="{StaticResource ControlStrokeColorDefault}" />
   <SolidColorBrush x:Key="ProgressBarIndeterminateBackground" Color="{DynamicResource ControlFillColorTransparent}" />
   <SolidColorBrush x:Key="ProgressBarIndeterminateBorderBrush" Color="{DynamicResource ControlFillColorTransparent}" />
   <!--  ProgressRing  -->
-  <SolidColorBrush x:Key="ProgressRingForegroundThemeBrush" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ProgressRingForegroundThemeBrush" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ProgressRingBackgroundThemeBrush" Color="{StaticResource ControlFillColorTransparent}" />
   <!--  RadioButton  -->
   <SolidColorBrush x:Key="RadioButtonForeground" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="RadioButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
   <SolidColorBrush x:Key="RadioButtonBackgroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
-  <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStroke" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStrokePointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+  <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStroke" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="RadioButtonOuterEllipseCheckedStrokePointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
   <SolidColorBrush x:Key="RadioButtonCheckGlyphFill" Color="{StaticResource TextOnAccentFillColorPrimary}" />
-  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedStrokePressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
-  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedStrokePressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
+  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+  <SolidColorBrush x:Key="RadioButtonCheckOuterEllipseCheckedFillPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
   <SolidColorBrush x:Key="RadioButtonOuterEllipseFill" Color="{StaticResource ControlAltFillColorSecondary}" />
   <SolidColorBrush x:Key="RadioButtonOuterEllipseFillPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
   <SolidColorBrush x:Key="RadioButtonOuterEllipseFillPressed" Color="{StaticResource ControlAltFillColorQuarternary}" />
@@ -524,7 +524,7 @@
   <SolidColorBrush x:Key="RadioButtonOuterEllipseStrokePressed" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
   <SolidColorBrush x:Key="RadioButtonOuterEllipseStrokeDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
   <!--  RatingControl  -->
-  <SolidColorBrush x:Key="RatingControlSelectedForeground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="RatingControlSelectedForeground" Color="{StaticResource SystemAccentColorLight2}" />
   <!-- RepeatButton -->
   <SolidColorBrush x:Key="RepeatButtonBackground" Color="{StaticResource ControlFillColorDefault}" />
   <SolidColorBrush x:Key="RepeatButtonBackgroundPointerOver" Color="{StaticResource ControlFillColorSecondary}" />
@@ -542,8 +542,8 @@
   <SolidColorBrush x:Key="SliderTrackFillPointerOver" Color="{StaticResource ControlStrongFillColorDefault}" />
   <SolidColorBrush x:Key="SliderTickBarFill" Color="{StaticResource ControlStrongFillColorDefault}" />
   <SolidColorBrush x:Key="SliderOuterThumbBackground" Color="{StaticResource ControlSolidFillColorDefault}" />
-  <SolidColorBrush x:Key="SliderThumbBackground" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="SliderThumbBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+  <SolidColorBrush x:Key="SliderThumbBackground" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="SliderThumbBackgroundPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
   <!--  SnackBar  -->
   <SolidColorBrush x:Key="SnackBarBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
   <SolidColorBrush x:Key="SnackBarForeground" Color="{StaticResource TextFillColorPrimary}" />
@@ -566,7 +566,7 @@
   <!--<SolidColorBrush x:Key="TextControlBorderBrush" Color="{StaticResource TextControlElevationBorderBrush}" />-->
   <SolidColorBrush x:Key="TextControlForeground" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="TextControlForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
-  <SolidColorBrush x:Key="TextControlFocusedBorderBrush" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="TextControlFocusedBorderBrush" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="TextControlBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
   <SolidColorBrush x:Key="TextControlPlaceholderForeground" Color="{StaticResource TextFillColorSecondary}" />
   <SolidColorBrush x:Key="TextControlButtonForeground" Color="{StaticResource TextFillColorSecondary}" />
@@ -589,9 +589,9 @@
   <SolidColorBrush x:Key="ToggleButtonBackgroundPointerOver" Color="{StaticResource ControlFillColorSecondary}" />
   <SolidColorBrush x:Key="ToggleButtonBackgroundPressed" Color="{StaticResource ControlFillColorTertiary}" />
   <SolidColorBrush x:Key="ToggleButtonBackgroundDisabled" Color="{StaticResource ControlFillColorDisabled}" />
-  <SolidColorBrush x:Key="ToggleButtonBackgroundChecked" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
-  <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPressed" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.8" />
+  <SolidColorBrush x:Key="ToggleButtonBackgroundChecked" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
+  <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedPressed" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.8" />
   <SolidColorBrush x:Key="ToggleButtonBackgroundCheckedDisabled" Color="{StaticResource AccentFillColorDisabled}" />
   <!--<SolidColorBrush x:Key="ToggleButtonBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
   <SolidColorBrush x:Key="ToggleButtonBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
@@ -610,11 +610,11 @@
   <SolidColorBrush x:Key="ToggleSwitchStrokeOff" Color="{StaticResource ControlStrongStrokeColorDefault}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOffPointerOver" Color="{StaticResource ControlStrongStrokeColorDefault}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOffDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
-  <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorLight2}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
-  <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorLight3}" />
-  <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorLight3}" Opacity="0.9" />
+  <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorLight2}" />
+  <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorLight2}" Opacity="0.9" />
   <SolidColorBrush x:Key="ToggleSwitchFillOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
   <SolidColorBrush x:Key="ToggleSwitchFillOff" Color="{StaticResource ControlAltFillColorSecondary}" />
   <SolidColorBrush x:Key="ToggleSwitchFillOffPointerOver" Color="{StaticResource ControlAltFillColorTertiary}" />
@@ -640,7 +640,7 @@
   <SolidColorBrush x:Key="TreeViewItemBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
   <SolidColorBrush x:Key="TreeViewItemBackgroundSelected" Color="{StaticResource SubtleFillColorSecondary}" />
   <SolidColorBrush x:Key="TreeViewItemForeground" Color="{StaticResource TextFillColorPrimary}" />
-  <SolidColorBrush x:Key="TreeViewItemSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight3}" />
+  <SolidColorBrush x:Key="TreeViewItemSelectionIndicatorForeground" Color="{StaticResource SystemAccentColorLight2}" />
   <Thickness x:Key="ButtonPadding">11,5,11,6</Thickness>
   <Thickness x:Key="ButtonBorderThemeThickness">1</Thickness>
   <Thickness x:Key="ButtonIconMargin">0,0,8,0</Thickness>
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
index a84186b08c4..2be052cf875 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
@@ -461,8 +461,6 @@
   <SolidColorBrush x:Key="TextControlBorderBrushDisabled" Color="{StaticResource SystemColorGrayTextColor}" />
   <SolidColorBrush x:Key="TextControlPlaceholderForeground" Color="{StaticResource SystemColorGrayTextColor}" />
   <SolidColorBrush x:Key="TextControlButtonForeground" Color="{StaticResource SystemColorWindowTextColor}" />
-  <!--  ThumbRate  -->
-  <SolidColorBrush x:Key="ThumbRateForeground" Color="{StaticResource SystemColorHighlightColor}" />
   <!--  TimePicker  -->
   <SolidColorBrush x:Key="TimePickerButtonBackground" Color="{StaticResource SystemColorWindowColor}" />
   <SolidColorBrush x:Key="TimePickerButtonBackgroundPointerOver" Color="{StaticResource SystemColorHighlightTextColor}" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
index f22dd9432fc..46e4bb6af37 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
@@ -385,7 +385,7 @@
   <SolidColorBrush x:Key="ComboBoxForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
   <!--<SolidColorBrush x:Key="ComboBoxItemBorderBrush" Color="{StaticResource ControlElevationBorderBrush}" />-->
   <SolidColorBrush x:Key="ComboBoxBorderBrushDisabled" Color="{StaticResource ControlStrokeColorDefault}" />
-  <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorDark2}" />
+  <SolidColorBrush x:Key="ComboBoxBorderBrushFocused" Color="{StaticResource SystemAccentColorDark1}" />
   <SolidColorBrush x:Key="ComboBoxDropDownGlyphForeground" Color="{StaticResource TextFillColorPrimary}" />
   <SolidColorBrush x:Key="ComboBoxDropDownBackground" Color="{StaticResource AcrylicBackgroundFillColorDefault}" />
   <SolidColorBrush x:Key="ComboBoxDropDownBorderBrush" Color="{StaticResource SurfaceStrokeColorFlyout}" />
@@ -430,8 +430,8 @@
   <SolidColorBrush x:Key="HyperlinkButtonBackgroundPointerOver" Color="{StaticResource SubtleFillColorSecondary}" />
   <SolidColorBrush x:Key="HyperlinkButtonBackgroundPressed" Color="{StaticResource SubtleFillColorTertiary}" />
   <SolidColorBrush x:Key="HyperlinkButtonBackgroundDisabled" Color="{StaticResource SubtleFillColorDisabled}" />
-  <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorDark1}" />
-  <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.9" />
+  <SolidColorBrush x:Key="HyperlinkButtonForeground" Color="{StaticResource SystemAccentColorDark2}" />
+  <SolidColorBrush x:Key="HyperlinkButtonForegroundPointerOver" Color="{StaticResource SystemAccentColorDark3}" Opacity="0.9" />
   <SolidColorBrush x:Key="HyperlinkButtonForegroundPressed" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.8" />
   <SolidColorBrush x:Key="HyperlinkButtonForegroundDisabled" Color="{StaticResource TextFillColorDisabled}" />
   <!--  InfoBadge  -->
@@ -446,7 +446,7 @@
   <SolidColorBrush x:Key="InfoBarErrorSeverityIconBackground" Color="{StaticResource SystemFillColorCritical}" />
   <SolidColorBrush x:Key="InfoBarWarningSeverityIconBackground" Color="{StaticResource SystemFillColorCaution}" />
   <SolidColorBrush x:Key="InfoBarSuccessSeverityIconBackground" Color="{StaticResource SystemFillColorSuccess}" />
-  <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColorDark1}" />
+  <SolidColorBrush x:Key="InfoBarInformationalSeverityIconBackground" Color="{StaticResource SystemAccentColor}" />
   <!--  Label  -->
   <SolidColorBrush x:Key="LabelForeground" Color="{StaticResource TextFillColorSecondary}" />
   <!--  ListBox  -->
@@ -606,7 +606,7 @@
   <SolidColorBrush x:Key="ToggleSwitchStrokeOffPointerOver" Color="{StaticResource ControlStrongStrokeColorDefault}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOffDisabled" Color="{StaticResource ControlStrongStrokeColorDisabled}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOn" Color="{StaticResource SystemAccentColorDark1}" />
-  <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorDark2}" />
+  <SolidColorBrush x:Key="ToggleSwitchStrokeOnPointerOver" Color="{StaticResource SystemAccentColorDark1}" />
   <SolidColorBrush x:Key="ToggleSwitchStrokeOnDisabled" Color="{StaticResource AccentFillColorDisabled}" />
   <SolidColorBrush x:Key="ToggleSwitchFillOn" Color="{StaticResource SystemAccentColorDark1}" />
   <SolidColorBrush x:Key="ToggleSwitchFillOnPointerOver" Color="{StaticResource SystemAccentColorDark1}" Opacity="0.9" />