program can figure out lightest and darkest mode

src/gui/theme/mod.rs

@@ -15,6 +15,7 @@ pub type Element<'msg, Message> = iced::Element<'msg, Message, Renderer>;
 #[derive(Clone)]
 pub struct Theme {
     colors: Colors,
+    is_light: bool,
 }
 
 impl Default for Theme {
@@ -29,6 +30,7 @@ impl Default for Theme {
                 secondary: Shades::new(pigment.secondary),
                 text: Shades::new(pigment.text),
             },
+            is_light: shades::is_light(pigment.background),
         }
     }
 }
@@ -216,7 +218,7 @@ impl text_input::StyleSheet for Theme {
 
     fn placeholder_color(&self, style: &Self::Style) -> iced::Color {
         match style {
-            TextInput::Primary => self.colors.text.light, //TODO lightest
+            TextInput::Primary => if self.is_light {self.colors.text.lightest} else {self.colors.text.darkest}
         }
     }
 

src/gui/theme/pigment.rs

@@ -14,18 +14,18 @@ impl Default for Pigment {
     fn default() -> Pigment {
         Pigment {
             //day theme
-            accent: hex_to_color("#f8073b").unwrap(),
-            background: hex_to_color("#fafafa").unwrap(),
-            primary: hex_to_color("#f9682f").unwrap(),
-            secondary: hex_to_color("#fef2cd").unwrap(),
-            text: hex_to_color("#050505").unwrap(),
+            // accent: hex_to_color("#f8073b").unwrap(),
+            // background: hex_to_color("#fafafa").unwrap(),
+            // primary: hex_to_color("#f9682f").unwrap(),
+            // secondary: hex_to_color("#fef2cd").unwrap(),
+            // text: hex_to_color("#050505").unwrap(),
 
             //night theme
-            // accent: hex_to_color("#928fd6").unwrap(),
-            // background: hex_to_color("#050505").unwrap(),
-            // primary: hex_to_color("#2a4b74").unwrap(),
-            // secondary: hex_to_color("#0e0e25").unwrap(),
-            // text: hex_to_color("#fafafa").unwrap(),
+            accent: hex_to_color("#928fd6").unwrap(),
+            background: hex_to_color("#050505").unwrap(),
+            primary: hex_to_color("#2a4b74").unwrap(),
+            secondary: hex_to_color("#0e0e25").unwrap(),
+            text: hex_to_color("#fafafa").unwrap(),
         }
     }
 }

src/gui/theme/shades.rs

@@ -62,6 +62,6 @@ fn lighten(color: Color, amount: f32) -> Color {
     from_hsl(hsl)
 }
 
-pub fn is_dark(color: Color) -> bool {
-    to_hsl(color).lightness < 0.5
+pub fn is_light(color: Color) -> bool {
+    to_hsl(color).lightness > 0.5
 }