toHsvColor method
Implementation
@override
HsvColor toHsvColor() {
num hslSaturation = s / 100;
num lightness = l / 100;
var value = lightness + hslSaturation * min(lightness, 1 - lightness);
var saturation = value == 0 ? 0 : 2 * (1 - lightness / value);
return HsvColor(h, saturation * 100, value * 100);
}