Ah, the Wikipedia article for "Primary Colors" is much better at explaining this than the one for "RGB Color". For instance, in the Tempra-paint-compatible subtractive system, you probably recall mixing red, yellow, and blue, and getting black, or at least a dark muddy brown. Conversely, in the additive system of RGB, mixing red, green, and blue, gives you... white! You've combined all the light there is, you should get the lightest color of them all.
-- Paul -- http://mail.python.org/mailman/listinfo/python-list
