diff --git a/packages/flutter/lib/src/material/theme_data.dart b/packages/flutter/lib/src/material/theme_data.dart
index 3410da74daa9..8c52484c1eee 100644
--- a/packages/flutter/lib/src/material/theme_data.dart
+++ b/packages/flutter/lib/src/material/theme_data.dart
@@ -224,7 +224,15 @@ class ThemeData with Diagnosticable {
     Brightness? primaryColorBrightness,
     Color? primaryColorLight,
     Color? primaryColorDark,
+    @Deprecated(
+      'Use colorScheme.secondary instead. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     Color? accentColor,
+    @Deprecated(
+      'No longer used by the framework, please remove any reference to it. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     Brightness? accentColorBrightness,
     Color? canvasColor,
     Color? shadowColor,
@@ -268,6 +276,10 @@ class ThemeData with Diagnosticable {
     String? fontFamily,
     TextTheme? textTheme,
     TextTheme? primaryTextTheme,
+    @Deprecated(
+      'No longer used by the framework, please remove any reference to it. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     TextTheme? accentTextTheme,
     InputDecorationTheme? inputDecorationTheme,
     IconThemeData? iconTheme,
@@ -550,7 +562,15 @@ class ThemeData with Diagnosticable {
     required this.primaryColorDark,
     required this.canvasColor,
     required this.shadowColor,
+    @Deprecated(
+      'Use colorScheme.secondary instead. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     required this.accentColor,
+    @Deprecated(
+      'No longer used by the framework, please remove any reference to it. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     required this.accentColorBrightness,
     required this.scaffoldBackgroundColor,
     required this.bottomAppBarColor,
@@ -591,10 +611,18 @@ class ThemeData with Diagnosticable {
     required this.toggleableActiveColor,
     required this.textTheme,
     required this.primaryTextTheme,
+    @Deprecated(
+      'No longer used by the framework, please remove any reference to it. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     required this.accentTextTheme,
     required this.inputDecorationTheme,
     required this.iconTheme,
     required this.primaryIconTheme,
+    @Deprecated(
+      'No longer used by the framework, please remove any reference to it. '
+      'This feature was deprecated after v2.3.0-0.1.pre.',
+    )
     required this.accentIconTheme,
     required this.sliderTheme,
     required this.tabBarTheme,
@@ -869,19 +897,35 @@ class ThemeData with Diagnosticable {
   /// overlay on or off for dark themes.
   final Color shadowColor;
 
-  /// The foreground color for widgets (knobs, text, overscroll edge effect, etc).
+  /// Obsolete property that was originally used as the foreground
+  /// color for widgets (knobs, text, overscroll edge effect, etc).
   ///
-  /// Accent color is also known as the secondary color.
+  /// The material library no longer uses this property. In most cases
+  /// the theme's [colorScheme] [ColorScheme.secondary] property is now
+  /// used instead.
   ///
-  /// The theme's [colorScheme] property contains [ColorScheme.secondary], as
-  /// well as a color that contrasts well with the secondary color called
-  /// [ColorScheme.onSecondary]. It might be simpler to just configure an app's
-  /// visuals in terms of the theme's [colorScheme].
+  /// Apps should migrate uses of this property to the theme's [colorScheme]
+  /// [ColorScheme.secondary] color. In cases where a color is needed that
+  /// that contrasts well with the secondary color [ColorScheme.onSecondary]
+  /// can be used.
+  @Deprecated(
+    'Use colorScheme.secondary instead. '
+    'This feature was deprecated after v2.3.0-0.1.pre.',
+  )
   final Color accentColor;
 
-  /// The brightness of the [accentColor]. Used to determine the color of text
-  /// and icons placed on top of the accent color (e.g. the icons on a floating
-  /// action button).
+  /// Obsolete property that was originally used to determine the color
+  /// of text and icons placed on top of the accent color (e.g. the
+  /// icons on a floating action button).
+  ///
+  /// The material library no longer uses this property. The
+  /// [floatingActionButtonTheme] can be used to configure
+  /// the appearance of [FloatingActionButton]s. The brightness
+  /// of any color can be found with [ThemeData.estimateBrightnessForColor].
+  @Deprecated(
+    'No longer used by the framework, please remove any reference to it. '
+    'This feature was deprecated after v2.3.0-0.1.pre.',
+  )
   final Brightness accentColorBrightness;
 
   /// The default color of the [Material] that underlies the [Scaffold]. The
@@ -931,8 +975,7 @@ class ThemeData with Diagnosticable {
   final Color selectedRowColor;
 
   /// The color used for widgets in their inactive (but enabled)
-  /// state. For example, an unchecked checkbox. Usually contrasted
-  /// with the [accentColor]. See also [disabledColor].
+  /// state. For example, an unchecked checkbox. See also [disabledColor].
   final Color unselectedWidgetColor;
 
   /// The color used for widgets that are inoperative, regardless of
@@ -1004,7 +1047,25 @@ class ThemeData with Diagnosticable {
   /// A text theme that contrasts with the primary color.
   final TextTheme primaryTextTheme;
 
-  /// A text theme that contrasts with the accent color.
+  /// Obsolete property that was originally used when a [TextTheme]
+  /// that contrasted well with the [accentColor] was needed.
+  ///
+  /// The material library no longer uses this property and most uses
+  /// of [accentColor] have been replaced with
+  /// the theme's [colorScheme] [ColorScheme.secondary].
+  /// You can configure the color of a [textTheme] [TextStyle] so that it
+  /// contrasts well with the [ColorScheme.secondary] like this:
+  ///
+  /// ```dart
+  /// final ThemeData theme = Theme.of(context);
+  /// theme.textTheme.headline1.copyWith(
+  ///   color: theme.colorScheme.onSecondary,
+  /// )
+  /// ```
+  @Deprecated(
+    'No longer used by the framework, please remove any reference to it. '
+    'This feature was deprecated after v2.3.0-0.1.pre.',
+  )
   final TextTheme accentTextTheme;
 
   /// The default [InputDecoration] values for [InputDecorator], [TextField],
@@ -1019,7 +1080,16 @@ class ThemeData with Diagnosticable {
   /// An icon theme that contrasts with the primary color.
   final IconThemeData primaryIconTheme;
 
-  /// An icon theme that contrasts with the accent color.
+  /// Obsolete property that was originally used when an [IconTheme]
+  /// that contrasted well with the [accentColor] was needed.
+  ///
+  /// The material library no longer uses this property and most uses
+  /// of [accentColor] have been replaced with
+  /// the theme's [colorScheme] [ColorScheme.secondary].
+  @Deprecated(
+    'No longer used by the framework, please remove any reference to it. '
+    'This feature was deprecated after v2.3.0-0.1.pre.',
+  )
   final IconThemeData accentIconTheme;
 
   /// The colors and shapes used to render [Slider].
@@ -1146,8 +1216,7 @@ class ThemeData with Diagnosticable {
   /// icon themes of a [NavigationRail].
   final NavigationRailThemeData navigationRailTheme;
 
-  /// The color and geometry [TextTheme] values used to configure [textTheme],
-  /// [primaryTextTheme], and [accentTextTheme].
+  /// The color and geometry [TextTheme] values used to configure [textTheme].
   final Typography typography;
 
   /// Components of the [CupertinoThemeData] to override from the Material
diff --git a/packages/flutter/test/material/theme_data_test.dart b/packages/flutter/test/material/theme_data_test.dart
index 82929fd01a20..a3599ef82257 100644
--- a/packages/flutter/test/material/theme_data_test.dart
+++ b/packages/flutter/test/material/theme_data_test.dart
@@ -51,15 +51,6 @@ void main() {
     expect(darkTheme.primaryTextTheme.headline6!.color, typography.white.headline6!.color);
   });
 
-  test('Default accent text theme contrasts with accent brightness', () {
-    final ThemeData lightTheme = ThemeData(accentColorBrightness: Brightness.light);
-    final ThemeData darkTheme = ThemeData(accentColorBrightness: Brightness.dark);
-    final Typography typography = Typography.material2018(platform: lightTheme.platform);
-
-    expect(lightTheme.accentTextTheme.headline6!.color, typography.black.headline6!.color);
-    expect(darkTheme.accentTextTheme.headline6!.color, typography.white.headline6!.color);
-  });
-
   test('Default chip label style gets a default bodyText1 if textTheme.bodyText1 is null', () {
     const TextTheme noBodyText1TextTheme = TextTheme(bodyText1: null);
     final ThemeData lightTheme = ThemeData(brightness: Brightness.light, textTheme: noBodyText1TextTheme);
@@ -88,15 +79,6 @@ void main() {
     expect(darkTheme.primaryTextTheme.headline6!.color, typography.white.headline6!.color);
   });
 
-  test('Default accent icon theme contrasts with accent brightness', () {
-    final ThemeData lightTheme = ThemeData(accentColorBrightness: Brightness.light);
-    final ThemeData darkTheme = ThemeData(accentColorBrightness: Brightness.dark);
-    final Typography typography = Typography.material2018(platform: lightTheme.platform);
-
-    expect(lightTheme.accentTextTheme.headline6!.color, typography.black.headline6!.color);
-    expect(darkTheme.accentTextTheme.headline6!.color, typography.white.headline6!.color);
-  });
-
   testWidgets('Defaults to MaterialTapTargetBehavior.padded on mobile platforms and MaterialTapTargetBehavior.shrinkWrap on desktop', (WidgetTester tester) async {
     final ThemeData themeData = ThemeData(platform: defaultTargetPlatform);
     switch (defaultTargetPlatform) {