rgbColor
fun rgbColor( red: Expression<IntValue>, green: Expression<IntValue>, blue: Expression<IntValue>, alpha: Expression<FloatValue>? = null): Expression<ColorValue>(source)
Creates a color value from red, green, and blue components, which must range between 0 and 255, and optionally an alpha component which must range between 0 and 1.
If any component is out of range, the expression is an error.