What Makes Some People See Colors Differently?

Color blindness is like when some people can’t tell the difference between red and green, or even see only black, white, and gray. Imagine your eyes are like a paint box: most people have three colors to mix with, but if you’re missing one, it changes how everything looks. It happens because of tiny cells in your eyes that help you see different colors.

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Examples

A boy at school can’t tell red and green crayons apart, his teacher says he has ‘color blindness.’
A man thinks the traffic light is all yellow, but it's actually red because of how his eyes see colors.
Some people have trouble telling blue from black, that’s a rare kind of color blindness.

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Categories: Science · color vision· genetics· optics· neuroscience· visual perception