properly organize custom colors

app/lib/core/design/app_colors.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class AppColors {
+  AppColors._();
+
+  static const Color seedColor = Color(0xFF167C80);
+
+  static const Color privateTabPurple = Color(0xFF8000D7);
+
+  static const Color privateTabBackground = Color(0xFF25003E);
+
+  static const Color privateSelectionOverlay = Color(0x648000D7);
+
+  static const Color torPurple = Color(0xFF7D4698);
+
+  static const Color torActiveGreen = Color(0xFF68B030);
+
+  static const Color torBackgroundGrey = Color(0xFF333A41);
+
+  static const Color dialogOverlay = Color(0x44000000);
+}

app/lib/core/providers/defaults.dart

@@ -19,14 +19,15 @@
  */
 import 'package:flutter/material.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:weblibre/core/design/app_colors.dart';
 
 part 'defaults.g.dart';
 
 @Riverpod(keepAlive: true)
-Color lightSeedColorFallback(Ref ref) => const Color(0xFF167C80);
+Color lightSeedColorFallback(Ref ref) => AppColors.seedColor;
 
 @Riverpod(keepAlive: true)
-Color darkSeedColorFallback(Ref ref) => const Color(0xFF167C80);
+Color darkSeedColorFallback(Ref ref) => AppColors.seedColor;
 
 @Riverpod(keepAlive: true)
 Uri docsUri(Ref ref) => Uri.parse('https://docs.weblibre.eu/');

app/lib/core/providers/defaults.g.dart

@@ -49,7 +49,7 @@ final class LightSeedColorFallbackProvider
 }
 
 String _$lightSeedColorFallbackHash() =>
-    r'af151d3293d372f5df451aa8c3a75136377b6ce1';
+    r'd5fb3ead5795c1cadd6c3a5f91ef84c3cbdaa3c1';
 
 @ProviderFor(darkSeedColorFallback)
 const darkSeedColorFallbackProvider = DarkSeedColorFallbackProvider._();
@@ -91,7 +91,7 @@ final class DarkSeedColorFallbackProvider
 }
 
 String _$darkSeedColorFallbackHash() =>
-    r'9418cf71e3d80c8a2142e0d3a8820989b29bff86';
+    r'a383dbf6edf4fee54a8215bc52a98f26354e4645';
 
 @ProviderFor(docsUri)
 const docsUriProvider = DocsUriProvider._();