You're referring to CMYK color seperation, I think.
Similar to RGB, but with different colors.
Pantone is a tint/hue chart
/edit: if you look real closely at your monitor, you'll find it's made of red green and blue dots...
(
Syncubus Yarr! Ye'll be walking Planck's Constant! [GMT-5],
Wed 31 Mar 2004, 3:57,
archived)