Click on the switches to turn the lights on and off. Red green and blue are are the primary colours of light (or the additive spectrum as it's sometimes know). By experimenting with different lights you'll notice that colours of light do not mix the same as colours of paint. And more surprisingly if you mix all the primary colours of light together you'll get white light. The secondary colours of light (those colours you get when you mix two primaries together) are cyan (light blue) magenta (dark pink) and yellow. These are similar to the primary colours of paint and are actually the true primary colours of the subtractive spectrum. (mixing paint is known as subtractive mixing).....go click.