We Might Also See Color So We Will Recognize Every Other

And you need color to have color vision?
So you need color vision to have color.
We May See Color So We Can Understand Each OtherEnlarge this image iStockphoto iStockphotoHumans and other primates see color thanks to three different kinds of cells in the retina.
Changes in skin color reveal all manner of information about ourselves — are we happy or sad, sexually receptive, ovulating, angry?
For many years — nearly a century, in fact — it was believed that color vision was for spotting ripe fruit.

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