lighten method

Color lighten([
  1. double amount = .1
])

Implementation

Color lighten([double amount = .1]) {
  assert(amount >= 0 && amount <= 1, _amountError);

  final hsl = HSLColor.fromColor(this);
  final hslLight =
      hsl.withLightness((hsl.lightness + amount).clamp(0.0, 1.0));

  return hslLight.toColor();
}