Growing Sweet William from Seed

I am planning to do a bed of Sweet William next season. I have collected seed from the few volunteers I currently have, and will get more from a buddy with an extensive garden of them.
My question: Given the different varieties of color and pattern, does each color yield seeds in that color, or do they express the entire range of colors? My worry is that the whites have yielded the most seed, yet are my least favorite. I have not seen a garden consisting of just one color.

By Brian M