lighten method
Lighten the color by adding the given amount
to lightness.
Implementation
Color lighten([double amount = 0.06]) {
if (_isWhiteOrBlack) {
final v = (red + amount * 255).round().clamp(0, 255);
return Color.fromARGB(alpha, v, v, v);
}
final hsl = HSLColor.fromColor(this);
return hsl
.withLightness(
(hsl.lightness + amount).clamp(0.0, 1.0),
)
.toColor();
}