operator / method
Implementation
Color operator /(dynamic v) {
if (v is double) {
return Color(r: r / v, g: g / v, b: b / v);
} else if (v is Color) {
return Color(r: r / v.r, g: g / v.g, b: b / v.b);
} else {
throw 'Color only support division by double or Color';
}
}