Free colorblind test

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Did you know that ...
bulls don't actually react to red?

Bulls are completely color blind. They charge the red cape because it is moving, not because it is red.

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Did you know that ...
some animals can see more colors than people?

Bees and butterflies can see colors people never see.

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Did you know that ...
babies are born color blind?

Babies can see only black, white, and shades of gray. They are usually able to distinguish between most colors by the age of 2 months.

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Did you know ...
who discovered color blindness?

John Dalton was the first to investigate color blindness and was color blind himself.
His diagnosis was confirmed in 1995, some 150 years after his death, by DNA analysis of his preserved eyeball, which he had donated to science.

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