darken property
Makes the color darker by the percentage specified in the first argument, or by 10% if no percentage is specified. Percentages should be specified as a float, e.g. an argument of 0.25 will result in a color 25% darker than the original. The darkening conversion is performed by adjusting the y component of the color in XYZ color space.
Implementation
static ColorFilter darken = ColorFilter((Color inputColor, [List<num> args = const []]) {
var color = inputColor.toCielabColor();
num percent = 0.1;
if (args.isNotEmpty) {
percent = args[0];
}
return CielabColor(color.l * (1 - percent), color.a, color.b);
}, CielabColor);