Pigments are cyan, yellow, and magenta. They are the complements of red, blue, and green respectively.
Check you're printer's color ink : )
You know, I almost added that they are turquoise, acid yellow and fuschia, because as a dyer I cannot make turquoise from 'primary' blue, or acid yellow from primary yellow dyes, but didn't want to confuse people
. I agree with you completely. In fact, when I teach my design classes at my university, I give both pigment primary models, because you generally do not see CYM listed as primaries in art textbooks, but it's far easier to mix colors using it as starting place.
There's a really interesting book on color that came out recently, where the author spent the time to figure out where the traditional pigments sit on the color wheel in terms of their optical qualities. Then he figured out how they correspond to serveral common brands of artist's paints in order to facilitate the mixing of true neutrals. His name is Stephen Quiller, and the book is Color Choices: Making Sense Out of Color Theory.
It's a fun read for artists, and very useful for color mixing.