use_colored_box
Use a 'ColoredBox' rather than a 'Container' with only a 'Color'.
Description
#The analyzer produces this diagnostic when a Container
is created that only sets the color.
Example
#The following code produces this diagnostic because the only attribute of the container that is set is the color
:
dart
import 'package:flutter/material.dart';
Widget build() {
return Container(
color: Colors.red,
child: const Text('hello'),
);
}
Common fixes
#Replace the Container
with a ColoredBox
:
dart
import 'package:flutter/material.dart';
Widget build() {
return ColoredBox(
color: Colors.red,
child: const Text('hello'),
);
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.