Dart APIunself_styleCustomColorssourceMauve sourceMauve property Null safety Color? sourceMauve final Implementation final Color? sourceMauve; unself_style unself_style CustomColors sourceMauve property CustomColors class Constructors CustomColors Properties gold goldContainer hashCode mauve mauveContainer onGold onGoldContainer onMauve onMauveContainer onVanilla onVanillaContainer runtimeType sourceGold sourceMauve sourceVanilla type vanilla vanillaContainer Methods copyWith harmonized lerp noSuchMethod toString Operators operator ==