I have to admit that I am not completely color blind, but I have some issues with red and green. I only recognize a 17 in the image below. Others – I am told – also see a 42.
Maybe this is why I opted for a clear black and white contrast in the re-launch of my website. After seeing the image below, I am even happier that I choose an easy and not ambiguous color scheme.
Colors can be deceptive. Look at this and decide whether you see balls of different colors.
If you believe that the balls are of different colors – shades of blue, red, and green – then you are not color blind, but the whole optical illusion worked.
Frankly, I could not believe it. I really had to test it with the pipette tool in Powerpoint (not any fancy graphical applications). Here are the colors of the top row of the balls (the ones that are cut off a bit):