For example, you see fuchsia (plant), and some of your blue and some of the red cones in your eyes react, signaling that the color we get is something in the middle. Once again, our brain does all of the calculations for us. Magenta is a color that doesn’t have its own wavelength. Does magenta even exist? Well, technically, no. What about magenta? We can see this color, but it’s not in the visible light spectrum. The same thing happens if you see something between blue and green, say the cloudless summer sky, which is cyan. The reflection makes some red and some green cones fire which signals to our brain that “O, my, this must be a mixture of two,” and we see yellow. Looking at the lemon, the waves reflected off that lemon are neither green nor red but something in between. But how come we can see any other color that is not red, green, or blue? Our fascinating brains do all the math for us. These cones usually have three types of photopigments (or less if you are color blind) – red, green, and blue. The structure of our eye, which is responsible for color, consists of color detectors called cones. In order to see color, we use – totally unexpectedly! – our eyes.
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