rgb / cmy   

  hue, value, saturation   

  exploration   

Roll your mouse over the above illustration. Although RGB and CYM belong to two different color "systems", they're really intimately related and they work together in many interesting ways.

For example, complimentary colors are directly across from each other on the color circle, such as the pairs of colors below.

Complimentary colors will neutralize and negate each other when combined together. In photography, for example, to neutralize a blue color cast you add a yellow filter, to neutralize a green color cast, add magenta, and the same for cyan and red.

When combining colors in any medium, whether it's paint and brushes or colored light and filters, any color can be made by combining the two colors on either side of it. Thus:

cyan = BLUE + GREEN
yellow = GREEN + RED
magenta = RED + BLUE

BLUE = magenta + cyan
GREEN = cyan + yellow
RED = yellow + magenta

You can see that the two color systems are completely dependent on each other and interconnected.