Map<int, Color> blueGrey = const {50 : const Color(0xFFECEFF1), 100 : const Color(0xFFCFD8DC), 200 : const Color(0xFFB0BEC5), 300 : const Color(0xFF90A4AE), 400 : const Color(0xFF78909C), 500 : const Color(0xFF607D8B), 600 : const Color(0xFF546E7A), 700 : const Color(0xFF455A64), 800 : const Color(0xFF37474F), 900 : const Color(0xFF263238)}

The blue-grey primary swatch.

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

This swatch has no corresponding accent swatch.

See also:

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