diff --git a/lib/src/editor/editor.dart b/lib/src/editor/editor.dart
index f1b23db34..3ed0a62f0 100644
--- a/lib/src/editor/editor.dart
+++ b/lib/src/editor/editor.dart
@@ -244,7 +244,7 @@ class QuillEditorState extends State<QuillEditor>
       cursorOpacityAnimates = true;
       cursorColor ??= selectionTheme.cursorColor ?? cupertinoTheme.primaryColor;
       selectionColor = selectionTheme.selectionColor ??
-          cupertinoTheme.primaryColor.withValues(alpha: 0.40);
+          cupertinoTheme.primaryColor.withValues(0.4);
       cursorRadius ??= const Radius.circular(2);
       cursorOffset = Offset(
           iOSHorizontalOffset / MediaQuery.devicePixelRatioOf(context), 0);
@@ -254,7 +254,7 @@ class QuillEditorState extends State<QuillEditor>
       cursorOpacityAnimates = false;
       cursorColor ??= selectionTheme.cursorColor ?? theme.colorScheme.primary;
       selectionColor = selectionTheme.selectionColor ??
-          theme.colorScheme.primary.withValues(alpha: 0.40);
+          theme.colorScheme.primary.withValues(0.4);
     }
 
     final showSelectionToolbar =
diff --git a/lib/src/editor/style_widgets/checkbox_point.dart b/lib/src/editor/style_widgets/checkbox_point.dart
index 1c98549cc..27810a145 100644
--- a/lib/src/editor/style_widgets/checkbox_point.dart
+++ b/lib/src/editor/style_widgets/checkbox_point.dart
@@ -35,15 +35,15 @@ class QuillCheckboxPointState extends State<QuillCheckboxPoint> {
     final fillColor = widget.value
         ? (widget.enabled
             ? theme.colorScheme.primary
-            : theme.colorScheme.onSurface.withValues(alpha: 0.5))
+            : theme.colorScheme.onSurface.withValues(0.5))
         : theme.colorScheme.surface;
     final borderColor = widget.value
         ? (widget.enabled
             ? theme.colorScheme.primary
-            : theme.colorScheme.onSurface.withValues(alpha: 0))
+            : theme.colorScheme.onSurface.withValues(0))
         : (widget.enabled
-            ? theme.colorScheme.onSurface.withValues(alpha: 0.5)
-            : theme.colorScheme.onSurface.withValues(alpha: 0.3));
+            ? theme.colorScheme.onSurface.withValues(0.5)
+            : theme.colorScheme.onSurface.withValues(0.3));
     final child = Container(
       alignment: AlignmentDirectional.centerEnd,
       padding: EdgeInsetsDirectional.only(end: widget.size / 2),
diff --git a/lib/src/editor/widgets/cursor.dart b/lib/src/editor/widgets/cursor.dart
index de126e909..432c512b6 100644
--- a/lib/src/editor/widgets/cursor.dart
+++ b/lib/src/editor/widgets/cursor.dart
@@ -232,7 +232,7 @@ class CursorCont extends ChangeNotifier {
   }
 
   void _onColorTick() {
-    color.value = _style.color.withValues(alpha: _blinkOpacityController.value);
+    color.value = _style.color.withValues(_blinkOpacityController.value);
     blink.value = show.value && _blinkOpacityController.value > 0;
   }
 }
diff --git a/lib/src/editor/widgets/default_styles.dart b/lib/src/editor/widgets/default_styles.dart
index 87636f63c..24c921f47 100644
--- a/lib/src/editor/widgets/default_styles.dart
+++ b/lib/src/editor/widgets/default_styles.dart
@@ -300,7 +300,7 @@ class DefaultStyles {
 
     final inlineCodeStyle = TextStyle(
       fontSize: 14,
-      color: themeData.colorScheme.primary.withValues(alpha: 0.8),
+      color: themeData.colorScheme.primary.withValues(0.8),
       fontFamily: fontFamily,
     );
 
@@ -464,7 +464,7 @@ class DefaultStyles {
           defaultTextStyle.style.copyWith(
             fontSize: 20,
             height: 1.5,
-            color: Colors.grey.withValues(alpha: 0.6),
+            color: Colors.grey.withValues(0.6),
           ),
           baseHorizontalSpacing,
           VerticalSpacing.zero,
@@ -479,7 +479,7 @@ class DefaultStyles {
         null,
       ),
       quote: DefaultTextBlockStyle(
-        TextStyle(color: baseStyle.color!.withValues(alpha: 0.6)),
+        TextStyle(color: baseStyle.color!.withValues(0.6)),
         baseHorizontalSpacing,
         baseVerticalSpacing,
         const VerticalSpacing(6, 2),
@@ -491,7 +491,7 @@ class DefaultStyles {
       ),
       code: DefaultTextBlockStyle(
           TextStyle(
-            color: Colors.blue.shade900.withValues(alpha: 0.9),
+            color: Colors.blue.shade900.withValues(0.9),
             fontFamily: fontFamily,
             fontSize: 13,
             height: 1.15,
diff --git a/lib/src/editor/widgets/float_cursor.dart b/lib/src/editor/widgets/float_cursor.dart
index f5849ae01..fc0971244 100644
--- a/lib/src/editor/widgets/float_cursor.dart
+++ b/lib/src/editor/widgets/float_cursor.dart
@@ -21,7 +21,7 @@ class FloatingCursorPainter {
 
   void paint(Canvas canvas) {
     final floatingCursorRect = this.floatingCursorRect;
-    final floatingCursorColor = style.color.withValues(alpha: 0.75);
+    final floatingCursorColor = style.color.withValues(0.75);
     if (floatingCursorRect == null) return;
     canvas.drawRRect(
       RRect.fromRectAndRadius(floatingCursorRect, _kFloatingCaretRadius),
diff --git a/lib/src/editor/widgets/link.dart b/lib/src/editor/widgets/link.dart
index 6338f4a8d..43cba4dba 100644
--- a/lib/src/editor/widgets/link.dart
+++ b/lib/src/editor/widgets/link.dart
@@ -215,7 +215,7 @@ class _CupertinoAction extends StatelessWidget {
             Icon(
               icon,
               size: theme.iconTheme.size,
-              color: theme.colorScheme.onSurface.withValues(alpha: 0.75),
+              color: theme.colorScheme.onSurface.withValues(0.75),
             )
           ],
         ),
@@ -273,7 +273,7 @@ class _MaterialAction extends StatelessWidget {
       leading: Icon(
         icon,
         size: theme.iconTheme.size,
-        color: theme.colorScheme.onSurface.withValues(alpha: 0.75),
+        color: theme.colorScheme.onSurface.withValues(0.75),
       ),
       title: Text(title),
       onTap: onPressed,
diff --git a/lib/src/editor/widgets/text/text_block.dart b/lib/src/editor/widgets/text/text_block.dart
index 01a4208e4..b4b9c3282 100644
--- a/lib/src/editor/widgets/text/text_block.dart
+++ b/lib/src/editor/widgets/text/text_block.dart
@@ -293,7 +293,7 @@ class EditableTextBlock extends StatelessWidget {
           return null;
         }
         return defaultStyles.code!.style.copyWith(
-          color: defaultStyles.code!.style.color!.withValues(alpha: 0.4),
+          color: defaultStyles.code!.style.color!.withValues(0.4),
         );
       }(),
       width: () {
diff --git a/lib/src/editor_toolbar_shared/color.dart b/lib/src/editor_toolbar_shared/color.dart
index 14e2c31be..f4c43768b 100644
--- a/lib/src/editor_toolbar_shared/color.dart
+++ b/lib/src/editor_toolbar_shared/color.dart
@@ -21,10 +21,10 @@ Color hexToColor(String? hexString) {
 String colorToHex(Color color) {
   int floatToInt8(double x) => (x * 255.0).round() & 0xff;
 
-  final alpha = floatToInt8(color.a);
-  final red = floatToInt8(color.r);
-  final green = floatToInt8(color.g);
-  final blue = floatToInt8(color.b);
+  final alpha = floatToInt8(color.alpha);
+  final red = floatToInt8(color.red);
+  final green = floatToInt8(color.green);
+  final blue = floatToInt8(color.blue);
 
   return '${alpha.toRadixString(16).padLeft(2, '0')}'
           '${red.toRadixString(16).padLeft(2, '0')}'