Yeah, but how do we know a color blinded person didn't make this test up. It could screw with the results.
You should post alot more of them so you can test all kids of colorblindness. Me personally I always hated these because I am colorblind and was given to much attention when I couldn't see them and people say it was fake. But there is also other reverse test on how colorblind people can pick up on other things normal vision type of people cant such as types of camo.
I'm color blind and can't really tell what the number is. I'm red-green color blind which makes traffic lights a real guessing game when the sunlight shines right on the lights.
This is pretty freaky, I always though my eyes were amazing with good sight. I see 21, and it surprisingly took me 5 minutes to see any number =S