Map<int, Color> redAccent = const {100 : const Color(0xFFFF8A80), 200 : const Color(0xFFFF5252), 400 : const Color(0xFFFF1744), 700 : const Color(0xFFD50000)}

The red accent swatch.

 new Icon(
   icon: Icons.widgets,
   color: Colors.redAccent[400],
 ),

See also:

  • red, the corresponding primary colors.
  • of, which allows you to select colors from the current theme rather than hard-coding colors in your build methods.