createMaterialColor method

MaterialColor createMaterialColor()

Creates a MaterialColor from the color.

Example:

Color color = Colors.blue;
MaterialColor materialColor = color.createMaterialColor();
print('Material Color: $materialColor'); // Output: MaterialColor(primary value: 428051,
                                          //   {50: Color(0xffe3f2fd), 100: Color(0xffbbdefb),
                                          //   200: Color(0xff90caf9), 300: Color(0xff64b5f6),
                                          //   400: Color(0xff42a5f5), 500: Color(0xff2196f3),
                                          //   600: Color(0xff1e88e5), 700: Color(0xff1976d2),
                                          //   800: Color(0xff1565c0), 900: Color(0xff0d47a1)});

Implementation

MaterialColor createMaterialColor() {
  List strengths = <double>[.05];
  Map<int, Color> swatch = <int, Color>{};
  final int r = red, g = green, b = blue;

  for (int i = 1; i < 10; i++) {
    strengths.add(0.1 * i);
  }
  for (var strength in strengths) {
    final double ds = 0.5 - strength;
    swatch[(strength * 1000).round()] = Color.fromRGBO(
      r + ((ds < 0 ? r : (255 - r)) * ds).round(),
      g + ((ds < 0 ? g : (255 - g)) * ds).round(),
      b + ((ds < 0 ? b : (255 - b)) * ds).round(),
      1,
    );
  }
  return MaterialColor(value, swatch);
}