02 June 2006
This is a colormap or colorcircle. It is very useful for every artist to do your own. In theory if you only have yellow, red and blue you can mix all colors. But in practice you need more colors because the available colors are not pure enough. The circular shape of the map is useful to locate the opposite or complimentary color. If you like to lessen intense of the original color, just add the complimentary color.