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This test, I think, is one of the most efficient tests for colorblindness on the web. You will be asked to simply look at nine squares, each containing a pattern of colored circles. If you are not at all colorblind, you will be able to see a number in each of these squares. If you are colorblind, you will have difficulty seeing the number in one or more of the nine squares.

It’s that simple. Now you can lay the question to rest once and for all. If you aren’t colorblind, you can go on with your life as usual. If you do turn out to be colorblind, you will have to make a few slight changes, but at least you will know.

Rick Saphire’s Colorblind Test

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