lighten method

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

Implementation

Color lighten([double amount = .1]) {
  assert(amount >= 0 && amount <= 1, 'Amount must be between 0 and 1');

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

  return hslLight.toColor();
}