lighten static method
Adjust a color and make it brighter.
Implementation
static Color lighten(Color color, [double amount = .1]) {
assert(amount >= 0 && amount <= 1, 'Needs to be in range');
final hsl = HSLColor.fromColor(color);
final hslLight =
hsl.withLightness((hsl.lightness + amount).clamp(0.0, 1.0));
return hslLight.toColor();
}