RGBColor.opBinary

Basic arithmetic for color operations. The value on the right can be a value of any numeric type.

Typical usage:

    RGBColor color = new RGBColor(255, 0, 0);   	// Red color
	
	auto newColor = color + 2;						// Add two for all channels in color
	color = color / 2;								// Divide all channels by two