修复color编译错误问题

lib/util/extension/color.dart

@@ -35,9 +35,9 @@ class HexColor {
   }
 
   /// Prefixes a hash sign if [leadingHashSign] is set to `true` (default is `true`).
-  String toHex({bool leadingHashSign = true}) => '${leadingHashSign ? '#' : ''}'
-      '${alpha.toRadixString(16).padLeft(2, '0')}'
-      '${red.toRadixString(16).padLeft(2, '0')}'
-      '${green.toRadixString(16).padLeft(2, '0')}'
-      '${blue.toRadixString(16).padLeft(2, '0')}';
+  // String toHex({bool leadingHashSign = true}) => '${leadingHashSign ? '#' : ''}'
+  //     '${alpha.toRadixString(16).padLeft(2, '0')}'
+  //     '${red.toRadixString(16).padLeft(2, '0')}'
+  //     '${green.toRadixString(16).padLeft(2, '0')}'
+  //     '${blue.toRadixString(16).padLeft(2, '0')}';
 }