And I am the only one to admit I can't figure out how to do the test.
Just drag each color block to the closest, between the transition between the two colors..
If you're not seeing differences other than shades, you're color blind.. 1-12 men are color blind..
I have a friend who's a color correctionist for catalogs, and yet he's color blind..
I sent him this I while back, and he had no clue what it said. He asked his wife to read it and she laughed for a couple minutes before telling him..
(sorry for the profanity, but it's the only one I can find that gets the point across)
I'll just post the link. One never knows when someone's grandchild is looking over a shoulder.