4.The Forbidden Colors
There are colors humans can’t see. This isn’t colorblindness but something that happens to everybody. Called “forbidden colors,” they are two-toned hues that can’t be seen by the naked eye because they cancel out each other’s frequencies. These mischievous elves are red-green and yellow-blue.
The same retina cells that activate when we see something red also deactivates in the presence of green. This dampening of cell activity registers as green in the brain. They both can’t happen at the same time and thus cannot be perceived together as a single hue. The same thing happens with yellow and blue. Researchers are divided into two camps.
There are those who believe forbidden colors can be produced and seen by humans during certain image experiments. But others argue the results are yet-unnamed intermediate shades of the known colors but not the true forbidden colors.
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