I worked in a paint store for a while in college. We never had a problem selling the "wrong" color mix that contractors rejected. Most of it was expensive paint rejected by the homeowner who picked the color in the first place.

At $30 a gallon, are you sure you didn't purchase the paint out of someone's trunk?

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken