Abstract: “Human brains seem to respond to colors in the same way, hinting, though not confirming, that one person’s “red” is much like another’s. It is an old philosophical puzzle — one much beloved by stoned college students — whether color perception is the same between two people. New research looked at brain activity among 15 people who were viewing different colors, and found that even at a very low level the activity was similar. Researchers could tell what color people were looking at by using patterns of neural activation they had seen in others. It is a “fundamentally new discovery,” one neuroscientist told Nature, and adds weight to the idea that color perception is universal.”