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By varying the amount of red, green and blue light, all of the colors in the visible spectrum can be produced. Considered to be part of the brain itself, the retina is covered by millions of light-sensitive cells, some shaped like rods and some like cones.
Beside this, how do I know we see the same colors?
In particular, people may not see all the same colors when they look at the same things. These scientists believe that color perception may not be predetermined like many have believed for hundreds of years. Most people have three different photoreceptors in the backs of their eyes that perceive red, green and blue.
Likewise, people ask, how many colors do you see test?
To take the test, count the colors you see in this spectrum: Fewer than 20 distinctive colors: Derval says you're a dichromat and only have two cones in your eye.
Red-green and yellow-blue are the so-called "forbidden colors." Composed of pairs of hues whose light frequencies automatically cancel each other out in the human eye, they're supposed to be impossible to see simultaneously. The limitation results from the way we perceive color in the first place.