enable lint use_full_hex_values_for_flutter_colors (#35056)

analysis_options.yaml

@@ -182,7 +182,7 @@ linter:
     - unnecessary_this
     - unrelated_type_equality_checks
     # - unsafe_html # not yet tested
-    # - use_full_hex_values_for_flutter_colors # not yet tested
+    - use_full_hex_values_for_flutter_colors
     # - use_function_type_syntax_for_parameters # not yet tested
     - use_rethrow_when_possible
     # - use_setters_to_change_properties # not yet tested

packages/flutter/test/cupertino/button_test.dart

@@ -203,8 +203,8 @@ void main() {
   testWidgets('Can specify colors', (WidgetTester tester) async {
     await tester.pumpWidget(boilerplate(child: CupertinoButton(
       child: const Text('Skeuomorph me'),
-      color: const Color(0x0000FF),
-      disabledColor: const Color(0x00FF00),
+      color: const Color(0x000000FF),
+      disabledColor: const Color(0x0000FF00),
       onPressed: () { },
     )));
 
@@ -212,12 +212,12 @@ void main() {
         find.widgetWithText(DecoratedBox, 'Skeuomorph me')
       ).decoration;
 
-    expect(boxDecoration.color, const Color(0x0000FF));
+    expect(boxDecoration.color, const Color(0x000000FF));
 
     await tester.pumpWidget(boilerplate(child: const CupertinoButton(
       child: Text('Skeuomorph me'),
-      color: Color(0x0000FF),
-      disabledColor: Color(0x00FF00),
+      color: Color(0x000000FF),
+      disabledColor: Color(0x0000FF00),
       onPressed: null,
     )));
 
@@ -225,7 +225,7 @@ void main() {
         find.widgetWithText(DecoratedBox, 'Skeuomorph me')
       ).decoration;
 
-    expect(boxDecoration.color, const Color(0x00FF00));
+    expect(boxDecoration.color, const Color(0x0000FF00));
   });
 
   testWidgets('Button respects themes', (WidgetTester tester) async {

packages/flutter/test/cupertino/text_field_test.dart

@@ -600,11 +600,11 @@ void main() {
             child: CupertinoTextField(
               placeholder: 'placeholder',
               style: TextStyle(
-                color: Color(0X00FFFFFF),
+                color: Color(0x00FFFFFF),
                 fontWeight: FontWeight.w300,
               ),
               placeholderStyle: TextStyle(
-                color: Color(0XAAFFFFFF),
+                color: Color(0xAAFFFFFF),
                 fontWeight: FontWeight.w600
               ),
             ),
@@ -613,14 +613,14 @@ void main() {
       );
 
       final Text placeholder = tester.widget(find.text('placeholder'));
-      expect(placeholder.style.color, const Color(0XAAFFFFFF));
+      expect(placeholder.style.color, const Color(0xAAFFFFFF));
       expect(placeholder.style.fontWeight, FontWeight.w600);
 
       await tester.enterText(find.byType(CupertinoTextField), 'input');
       await tester.pump();
 
       final EditableText inputText = tester.widget(find.text('input'));
-      expect(inputText.style.color, const Color(0X00FFFFFF));
+      expect(inputText.style.color, const Color(0x00FFFFFF));
       expect(inputText.style.fontWeight, FontWeight.w300);
     },
   );

packages/flutter/test/material/bottom_navigation_bar_test.dart

@@ -199,8 +199,8 @@ void main() {
   });
 
   testWidgets('Custom selected and unselected icon themes', (WidgetTester tester) async {
-    const IconThemeData selectedIconTheme = IconThemeData(size: 36, color: Color(1));
-    const IconThemeData unselectedIconTheme = IconThemeData(size: 18, color: Color(2));
+    const IconThemeData selectedIconTheme = IconThemeData(size: 36, color: Color(0x00000001));
+    const IconThemeData unselectedIconTheme = IconThemeData(size: 18, color: Color(0x00000002));
 
     await tester.pumpWidget(
       MaterialApp(
@@ -233,10 +233,10 @@ void main() {
   });
 
   testWidgets('color on icon theme overrides selected and unselected item colors', (WidgetTester tester) async {
-    const IconThemeData selectedIconTheme = IconThemeData(size: 36, color: Color(1));
-    const IconThemeData unselectedIconTheme = IconThemeData(size: 18, color: Color(2));
-    const Color selectedItemColor = Color(3);
-    const Color unselectedItemColor = Color(4);
+    const IconThemeData selectedIconTheme = IconThemeData(size: 36, color: Color(0x00000001));
+    const IconThemeData unselectedIconTheme = IconThemeData(size: 18, color: Color(0x00000002));
+    const Color selectedItemColor = Color(0x00000003);
+    const Color unselectedItemColor = Color(0x00000004);
 
     await tester.pumpWidget(
       MaterialApp(

packages/flutter/test/material/button_bar_test.dart

@@ -70,7 +70,7 @@ void main() {
 
     await tester.pumpWidget(
       MaterialApp(
-        theme: ThemeData(accentColor: const Color(1)),
+        theme: ThemeData(accentColor: const Color(0x00000001)),
         home: Builder(
           builder: (BuildContext context) {
             return Center(
@@ -104,7 +104,7 @@ void main() {
       ),
     );
 
-    expect(tester.widget<RawMaterialButton>(find.byType(RawMaterialButton)).textStyle.color, const Color(1));
+    expect(tester.widget<RawMaterialButton>(find.byType(RawMaterialButton)).textStyle.color, const Color(0x00000001));
 
     // Show the dialog
     await tester.tap(find.text('button'));
@@ -114,6 +114,6 @@ void main() {
       of: find.text('enabled'),
       matching: find.byType(RawMaterialButton),
     );
-    expect(tester.widget<RawMaterialButton>(dialogButton).textStyle.color, const Color(1));
+    expect(tester.widget<RawMaterialButton>(dialogButton).textStyle.color, const Color(0x00000001));
   });
 }

packages/flutter/test/material/button_theme_test.dart

@@ -331,10 +331,10 @@ void main() {
   testWidgets('button theme with stateful color changes color in states', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {

packages/flutter/test/material/colors_test.dart

@@ -14,42 +14,42 @@ void main() {
     const MaterialColor color = MaterialColor(
       500,
       <int, Color>{
-         50: Color(50),
-        100: Color(100),
-        200: Color(200),
-        300: Color(300),
-        400: Color(400),
-        500: Color(500),
-        600: Color(600),
-        700: Color(700),
-        800: Color(800),
-        900: Color(900),
+         50: Color(0x00000050),
+        100: Color(0x00000100),
+        200: Color(0x00000200),
+        300: Color(0x00000300),
+        400: Color(0x00000400),
+        500: Color(0x00000500),
+        600: Color(0x00000600),
+        700: Color(0x00000700),
+        800: Color(0x00000800),
+        900: Color(0x00000900),
       },
     );
 
     expect(color.value, 500);
 
-    expect(color[50].value, 50);
-    expect(color[100].value, 100);
-    expect(color[200].value, 200);
-    expect(color[300].value, 300);
-    expect(color[400].value, 400);
-    expect(color[500].value, 500);
-    expect(color[600].value, 600);
-    expect(color[700].value, 700);
-    expect(color[800].value, 800);
-    expect(color[900].value, 900);
+    expect(color[50].value, 0x00000050);
+    expect(color[100].value, 0x00000100);
+    expect(color[200].value, 0x00000200);
+    expect(color[300].value, 0x00000300);
+    expect(color[400].value, 0x00000400);
+    expect(color[500].value, 0x00000500);
+    expect(color[600].value, 0x00000600);
+    expect(color[700].value, 0x00000700);
+    expect(color[800].value, 0x00000800);
+    expect(color[900].value, 0x00000900);
 
-    expect(color.shade50.value, 50);
-    expect(color.shade100.value, 100);
-    expect(color.shade200.value, 200);
-    expect(color.shade300.value, 300);
-    expect(color.shade400.value, 400);
-    expect(color.shade500.value, 500);
-    expect(color.shade600.value, 600);
-    expect(color.shade700.value, 700);
-    expect(color.shade800.value, 800);
-    expect(color.shade900.value, 900);
+    expect(color.shade50.value, 0x00000050);
+    expect(color.shade100.value, 0x00000100);
+    expect(color.shade200.value, 0x00000200);
+    expect(color.shade300.value, 0x00000300);
+    expect(color.shade400.value, 0x00000400);
+    expect(color.shade500.value, 0x00000500);
+    expect(color.shade600.value, 0x00000600);
+    expect(color.shade700.value, 0x00000700);
+    expect(color.shade800.value, 0x00000800);
+    expect(color.shade900.value, 0x00000900);
   });
 
   test('Colors swatches do not contain duplicates', () {

packages/flutter/test/material/flat_button_test.dart

@@ -147,10 +147,10 @@ void main() {
   testWidgets('FlatButton uses stateful color for text color in different states', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -214,10 +214,10 @@ void main() {
     final FocusNode focusNode = FocusNode();
     final Key buttonKey = UniqueKey();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -279,9 +279,9 @@ void main() {
   testWidgets('FlatButton ignores disabled text color if text color is stateful', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color disabledColor = Color(1);
-    const Color defaultColor = Color(2);
-    const Color unusedDisabledTextColor = Color(3);
+    const Color disabledColor = Color(0x00000001);
+    const Color defaultColor = Color(0x00000002);
+    const Color unusedDisabledTextColor = Color(0x00000003);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.disabled)) {

packages/flutter/test/material/input_decorator_test.dart

@@ -3015,8 +3015,8 @@ void main() {
       suffixStyle: TextStyle(height: 8.0),
       counterStyle: TextStyle(height: 9.0),
       filled: true,
-      fillColor: Color(0x10),
-      focusColor: Color(0x20),
+      fillColor: Color(0x00000010),
+      focusColor: Color(0x00000020),
       errorBorder: UnderlineInputBorder(),
       focusedBorder: OutlineInputBorder(),
       focusedErrorBorder: UnderlineInputBorder(),

packages/flutter/test/material/outline_button_test.dart

@@ -150,10 +150,10 @@ void main() {
   testWidgets('OutlineButton uses stateful color for text color in different states', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -217,10 +217,10 @@ void main() {
     final FocusNode focusNode = FocusNode();
     final Key buttonKey = UniqueKey();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -282,9 +282,9 @@ void main() {
   testWidgets('OutlineButton ignores disabled text color if text color is stateful', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color disabledColor = Color(1);
-    const Color defaultColor = Color(2);
-    const Color unusedDisabledTextColor = Color(3);
+    const Color disabledColor = Color(0x00000001);
+    const Color defaultColor = Color(0x00000002);
+    const Color unusedDisabledTextColor = Color(0x00000003);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.disabled)) {
@@ -425,7 +425,7 @@ void main() {
         ..path(color: disabledBorderColor, strokeWidth: borderWidth));
     _checkPhysicalLayer(
       tester.element(outlineButton),
-      const Color(0),
+      const Color(0x00000000),
       clipPath: clipPath,
       clipRect: clipRect,
     );

packages/flutter/test/material/raised_button_test.dart

@@ -82,10 +82,10 @@ void main() {
   testWidgets('RaisedButton uses stateful color for text color in different states', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -150,10 +150,10 @@ void main() {
     final FocusNode focusNode = FocusNode();
     final Key buttonKey = UniqueKey();
 
-    const Color pressedColor = Color(1);
-    const Color hoverColor = Color(2);
-    const Color focusedColor = Color(3);
-    const Color defaultColor = Color(4);
+    const Color pressedColor = Color(0x00000001);
+    const Color hoverColor = Color(0x00000002);
+    const Color focusedColor = Color(0x00000003);
+    const Color defaultColor = Color(0x00000004);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.pressed)) {
@@ -215,9 +215,9 @@ void main() {
   testWidgets('RaisedButton ignores disabled text color if text color is stateful', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode();
 
-    const Color disabledColor = Color(1);
-    const Color defaultColor = Color(2);
-    const Color unusedDisabledTextColor = Color(3);
+    const Color disabledColor = Color(0x00000001);
+    const Color defaultColor = Color(0x00000002);
+    const Color unusedDisabledTextColor = Color(0x00000003);
 
     Color getTextColor(Set<MaterialState> states) {
       if (states.contains(MaterialState.disabled)) {

packages/flutter/test/material/tabs_test.dart

@@ -2282,8 +2282,8 @@ void main() {
   // Regression test for https://github.com/flutter/flutter/issues/15008.
   testWidgets('TabBar with one tab has correct color', (WidgetTester tester) async {
     const Tab tab = Tab(text: 'A');
-    const Color selectedTabColor = Color(1);
-    const Color unselectedTabColor = Color(2);
+    const Color selectedTabColor = Color(0x00000001);
+    const Color unselectedTabColor = Color(0x00000002);
 
     await tester.pumpWidget(boilerplate(
       child: const DefaultTabController(

packages/flutter/test/material/text_theme_test.dart

@@ -74,10 +74,10 @@ void main() {
     // The `displayColor` is applied to [display4], [display3], [display2],
     // [display1], and [caption]. The `bodyColor` is applied to the remaining
     // text styles.
-    const Color displayColor = Color(1);
-    const Color bodyColor = Color(2);
+    const Color displayColor = Color(0x00000001);
+    const Color bodyColor = Color(0x00000002);
     const String fontFamily = 'fontFamily';
-    const Color decorationColor = Color(3);
+    const Color decorationColor = Color(0x00000003);
     const TextDecorationStyle decorationStyle = TextDecorationStyle.dashed;
     final TextDecoration decoration = TextDecoration.combine(<TextDecoration>[
       TextDecoration.underline,

packages/flutter/test/rendering/layers_test.dart

@@ -251,7 +251,7 @@ void main() {
   });
 
   test('mutating ShaderMaskLayer fields triggers needsAddToScene', () {
-    const Gradient gradient = RadialGradient(colors: <Color>[Color(0), Color(1)]);
+    const Gradient gradient = RadialGradient(colors: <Color>[Color(0x00000000), Color(0x00000001)]);
     final Shader shader = gradient.createShader(Rect.zero);
     final ShaderMaskLayer layer = ShaderMaskLayer(shader: shader, maskRect: Rect.zero, blendMode: BlendMode.clear);
     checkNeedsAddToScene(layer, () {
@@ -274,7 +274,7 @@ void main() {
 
   test('mutating PhysicalModelLayer fields triggers needsAddToScene', () {
     final PhysicalModelLayer layer = PhysicalModelLayer(
-        clipPath: Path(), elevation: 0, color: const Color(0), shadowColor: const Color(0));
+        clipPath: Path(), elevation: 0, color: const Color(0x00000000), shadowColor: const Color(0x00000000));
     checkNeedsAddToScene(layer, () {
       final Path newPath = Path();
       newPath.addRect(unitRect);
@@ -284,10 +284,10 @@ void main() {
       layer.elevation = 1;
     });
     checkNeedsAddToScene(layer, () {
-      layer.color = const Color(1);
+      layer.color = const Color(0x00000001);
     });
     checkNeedsAddToScene(layer, () {
-      layer.shadowColor = const Color(1);
+      layer.shadowColor = const Color(0x00000001);
     });
   });
 
@@ -330,14 +330,14 @@ void main() {
       final PhysicalModelLayer layerA = PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(0, 0, 20, 20)),
         elevation: 3.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       final PhysicalModelLayer layerB =PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(10, 10, 20, 20)),
         elevation: 2.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       _testConflicts(layerA, layerB, expectedErrorCount: 1);
     });
@@ -354,14 +354,14 @@ void main() {
       final PhysicalModelLayer layerA = PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(0, 0, 20, 20)),
         elevation: 3.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       final PhysicalModelLayer layerB =PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(10, 10, 20, 20)),
         elevation: 2.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       _testConflicts(layerA, layerB, expectedErrorCount: 0, enableCheck: false);
     });
@@ -376,14 +376,14 @@ void main() {
       final PhysicalModelLayer layerA = PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(0, 0, 20, 20)),
         elevation: 3.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       final PhysicalModelLayer layerB =PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(20, 20, 20, 20)),
         elevation: 2.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       _testConflicts(layerA, layerB, expectedErrorCount: 0);
     });
@@ -400,22 +400,22 @@ void main() {
       final PhysicalModelLayer layerA = PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(0, 0, 20, 20)),
         elevation: 3.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
 
       layerA.append(PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(2, 2, 10, 10)),
         elevation: 1.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       ));
 
       final PhysicalModelLayer layerB =PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(20, 20, 20, 20)),
         elevation: 2.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
       _testConflicts(layerA, layerB, expectedErrorCount: 0);
     });
@@ -435,22 +435,22 @@ void main() {
       final PhysicalModelLayer layerA = PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(0, 0, 20, 20)),
         elevation: 3.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
 
       layerA.append(PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(15, 15, 25, 25)),
         elevation: 2.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       ));
 
       final PhysicalModelLayer layerB =PhysicalModelLayer(
         clipPath: Path()..addRect(const Rect.fromLTWH(20, 20, 20, 20)),
         elevation: 4.0,
-        color: const Color(0),
-        shadowColor: const Color(0),
+        color: const Color(0x00000000),
+        shadowColor: const Color(0x00000000),
       );
 
       _testConflicts(layerA, layerB, expectedErrorCount: 1);

packages/flutter/test/rendering/table_border_test.dart

@@ -63,12 +63,12 @@ void main() {
   });
 
   test('TableBorder.lerp', () {
-    const BorderSide side1 = BorderSide(width: 1.0, color: Color(1));
-    const BorderSide side2 = BorderSide(width: 2.0, color: Color(2));
-    const BorderSide side3 = BorderSide(width: 3.0, color: Color(3));
-    const BorderSide side4 = BorderSide(width: 4.0, color: Color(4));
-    const BorderSide side5 = BorderSide(width: 5.0, color: Color(5));
-    const BorderSide side6 = BorderSide(width: 6.0, color: Color(6));
+    const BorderSide side1 = BorderSide(width: 1.0, color: Color(0x00000001));
+    const BorderSide side2 = BorderSide(width: 2.0, color: Color(0x00000002));
+    const BorderSide side3 = BorderSide(width: 3.0, color: Color(0x00000003));
+    const BorderSide side4 = BorderSide(width: 4.0, color: Color(0x00000004));
+    const BorderSide side5 = BorderSide(width: 5.0, color: Color(0x00000005));
+    const BorderSide side6 = BorderSide(width: 6.0, color: Color(0x00000006));
     const TableBorder tableA = TableBorder(
       top: side1,
       right: side2,

packages/flutter/test/widgets/state_setting_in_scrollables_test.dart

@@ -28,38 +28,38 @@ class FooState extends State<Foo> {
                   scrollController.animateTo(200.0, duration: const Duration(milliseconds: 500), curve: Curves.linear);
                 },
                 child: const DecoratedBox(
-                  decoration: BoxDecoration(color: Color(0)),
+                  decoration: BoxDecoration(color: Color(0x00000000)),
                   child: SizedBox(
                     height: 200.0,
                   ),
                 ),
               ),
               const DecoratedBox(
-                decoration: BoxDecoration(color: Color(0)),
+                decoration: BoxDecoration(color: Color(0x00000000)),
                 child: SizedBox(
                   height: 200.0,
                 ),
               ),
               const DecoratedBox(
-                decoration: BoxDecoration(color: Color(0)),
+                decoration: BoxDecoration(color: Color(0x00000000)),
                 child: SizedBox(
                   height: 200.0,
                 ),
               ),
               const DecoratedBox(
-                decoration: BoxDecoration(color: Color(0)),
+                decoration: BoxDecoration(color: Color(0x00000000)),
                 child: SizedBox(
                   height: 200.0,
                 ),
               ),
               const DecoratedBox(
-                decoration: BoxDecoration(color: Color(0)),
+                decoration: BoxDecoration(color: Color(0x00000000)),
                 child: SizedBox(
                   height: 200.0,
                 ),
               ),
               const DecoratedBox(
-                decoration: BoxDecoration(color: Color(0)),
+                decoration: BoxDecoration(color: Color(0x00000000)),
                 child: SizedBox(
                   height: 200.0,
                 ),

packages/flutter/test/widgets/text_golden_test.dart

@@ -736,13 +736,13 @@ void main() {
                           child: Text.rich(
                             TextSpan(
                               text: 'inner',
-                              style: TextStyle(color: Color(0xff402f4ff)),
+                              style: TextStyle(color: Color(0xf402f4ff)),
                               children: <InlineSpan>[
                                 WidgetSpan(
                                   child: Text.rich(
                                     TextSpan(
                                       text: 'inner2',
-                                      style: TextStyle(color: Color(0xff003ffff)),
+                                      style: TextStyle(color: Color(0xf003ffff)),
                                       children: <InlineSpan>[
                                         WidgetSpan(
                                           child: SizedBox(

packages/flutter/test/widgets/title_test.dart

@@ -40,7 +40,7 @@ void main() {
 
   testWidgets('should not allow non-opaque color', (WidgetTester tester) async {
     expect(() => Title(
-      color: const Color(0),
+      color: const Color(0x00000000),
       child: Container(),
     ), throwsAssertionError);
   });