I've always considered myself pretty good at colors. You know, if it's orange or if it's red, if it's navy or if it's black, that sort of thing. Ask my mom and she'll tell you I went to kindergarten in some pretty wild ensembles of my own choosing, so I'm not saying matching is my forte, but I appreciate color. Anyway, I just had my mind blown. See that psychedelic swirl? How many colors are in it?
You have to click through to get your own mind blown. I read about it on Bad Astronomy, and Richard Wiseman does a neat Photoshop trick with it in case you're not convinced of the answer. But I'll tell you this: whatever you answer, you're probably wrong!