diff --git a/frontend/lib/widgets/admin/validation_family_wizard.dart b/frontend/lib/widgets/admin/validation_family_wizard.dart
index 4354ab6..07bff2a 100644
--- a/frontend/lib/widgets/admin/validation_family_wizard.dart
+++ b/frontend/lib/widgets/admin/validation_family_wizard.dart
@@ -309,7 +309,7 @@ class _ValidationFamilyWizardState extends State<ValidationFamilyWizard> {
 
   static List<BoxShadow> _enfantCardShadows() => [
         BoxShadow(
-          color: Colors.black.withValues(alpha: 0.06),
+          color: Colors.black.withOpacity(0.06),
           blurRadius: 14,
           offset: const Offset(0, 4),
         ),
@@ -514,10 +514,10 @@ class _ValidationFamilyWizardState extends State<ValidationFamilyWizard> {
       height: height,
       decoration: BoxDecoration(
         borderRadius: BorderRadius.circular(photoRadius),
-        border: Border.all(color: Colors.black.withValues(alpha: 0.08)),
+        border: Border.all(color: Colors.black.withOpacity(0.08)),
         boxShadow: [
           BoxShadow(
-            color: Colors.black.withValues(alpha: 0.05),
+            color: Colors.black.withOpacity(0.05),
             blurRadius: 6,
             offset: const Offset(0, 2),
           ),
diff --git a/frontend/lib/widgets/child_card_widget.dart b/frontend/lib/widgets/child_card_widget.dart
index 7d93ecc..afad14e 100644
--- a/frontend/lib/widgets/child_card_widget.dart
+++ b/frontend/lib/widgets/child_card_widget.dart
@@ -195,9 +195,9 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
         ? Colors.purple.shade200 
         : (widget.childData.cardColor == CardColorVertical.pink ? Colors.pink.shade200 : Colors.grey.shade200);
     final Color initialPhotoShadow =
-        Color.alphaBlend(Colors.black.withValues(alpha: 0.22), baseCardColorForShadow);
+        Color.alphaBlend(Colors.black.withOpacity(0.22), baseCardColorForShadow);
     final Color hoverPhotoShadow =
-        Color.alphaBlend(Colors.black.withValues(alpha: 0.32), baseCardColorForShadow);
+        Color.alphaBlend(Colors.black.withOpacity(0.32), baseCardColorForShadow);
 
     final double photoSide = 200.0 * (config.isMobile ? 0.8 : 1.0);
     final double editableCardWidth = config.isMobile
@@ -722,7 +722,7 @@ class _ChildCardWidgetState extends State<ChildCardWidget> {
             style: OutlinedButton.styleFrom(
               padding: EdgeInsets.symmetric(vertical: padV),
               visualDensity: VisualDensity.compact,
-              backgroundColor: on ? Colors.black.withValues(alpha: 0.08) : Colors.transparent,
+              backgroundColor: on ? Colors.black.withOpacity(0.08) : Colors.transparent,
               foregroundColor: Colors.black87,
               side: BorderSide(
                 width: on ? 2 : 1,
diff --git a/frontend/lib/widgets/custom_app_text_field.dart b/frontend/lib/widgets/custom_app_text_field.dart
index 2db1ab3..dae6364 100644
--- a/frontend/lib/widgets/custom_app_text_field.dart
+++ b/frontend/lib/widgets/custom_app_text_field.dart
@@ -89,7 +89,7 @@ class _CustomAppTextFieldState extends State<CustomAppTextField> {
     final Color labelColor =
         widget.enabled ? Colors.black87 : Colors.grey;
     final Color hintColor = widget.enabled
-        ? Colors.black54.withValues(alpha: 0.7)
+        ? Colors.black54.withOpacity(0.7)
         : Colors.grey;
 
     return Column(