indigo constant Null safety

MaterialColor const indigo

The indigo primary color and swatch.

link 
Icon(
  Icons.widgets,
  color: Colors.indigo[400],
)

See also:

  • indigoAccent, the corresponding accent colors.
  • blue and deepPurple, similar colors.
  • Theme.of, which allows you to select colors from the current theme rather than hard-coding colors in your build methods.

Implementation

static const MaterialColor indigo = MaterialColor(
  _indigoPrimaryValue,
  <int, Color>{
     50: Color(0xFFE8EAF6),
    100: Color(0xFFC5CAE9),
    200: Color(0xFF9FA8DA),
    300: Color(0xFF7986CB),
    400: Color(0xFF5C6BC0),
    500: Color(_indigoPrimaryValue),
    600: Color(0xFF3949AB),
    700: Color(0xFF303F9F),
    800: Color(0xFF283593),
    900: Color(0xFF1A237E),
  },
);