Yeah, I found this yesterday; http://color.method.ac/
As the title says, it's a color matching game. I don't think it is the best way to learn to recognize colors, but it seem to be a fun and quick way to evaluate how good you actually are, and what your weaknesses are. My weakness seems to be blue and blue-green :( The irony; those are my favorite colors...
9.3, try to beat me!