Our eyes have receptors called cones for three different colors: red, green, and blue. By combining the three colors in different ways, secondary colors can be created. For example, a combination of blue and red makes purple. This is not only important for being able to interpret colors immediately, but also it allows the brain to correct for different color temperatures.
For instance, our brains report white paper as white even if it were under a blue light, despite only activating the blue receptors. By exploiting this fact about how our eyes work and exposing our eyes to bright primary or secondary colors, we can saturate the corresponding cones and thus block out other signals. The effect soon fades, however, as the brain readjusts to the normal world.
Researchers have criticized this possibility of impossible colors as they believe these are just intermediary colors between two color cones Pappas, However, we do know that people have seen colors that they have never seen before.
View a gallery of the colors here! For example, to see superblue, stare at pure yellow for a minute or so, then immediately look at blue. The blue should appear bluer than normal. Pappas, S. Color Intelligence. Fehlhaber, K. What a fun read!
There is a nasty rumor making its way around the interconnected series of tubes we call the Internet. See, what we call the "visible spectrum" is really a very narrow band in a much larger spectrum of electromagnetic radiation. It is visible because our eyes have cells called "cones" in the retina that are sensitive to these wavelengths—in the range of about —nm—to varying degrees. Some of the cones are sensitive to longer wavelengths, some to medium wavelengths, and others to shorter wavelengths.
These wavelengths correspond to roughly what we call red, green, and blue light, and form the basis of the RGB color model used by digital images, TVs, flat panels, and more. As visible light enters the eye and strikes the cone cells, the cells send electrical signals along the optic nerve to the brain. This is how our body "senses" light. Our brain interprets those three separate sensations to produce the perception that we call "color. So back to this rumor that magenta somehow isn't a color.
Elliott's thesis centers on the argument that magenta appears nowhere on the spectrum of visible light, so it therefore isn't a "real" color. You can't do it! There is no wavelength of light that makes magenta. So how do we see it? Here's how it works You can't find magenta in the visible spectrum because magenta cannot be emitted as a wavelength of light.
Yet magenta exists; you can see it on this color wheel. Magenta is the complementary color to green or the color of the afterimage you would see after you stare at a green light.
All of the colors of light have complementary colors that exist in the visible spectrum, except for green's complement, magenta. Most of the time your brain averages the wavelengths of light you see in order to come up with a color. For example, if you mix red light and green light, you'll see a yellow light. However, if you mix violet light and red light, you see magenta rather than the average wavelength, which would be green.
Your brain has come up with a way to bring the ends of the visible spectrum together in a way that makes sense. Pretty cool, don't you think? Actively scan device characteristics for identification. Use precise geolocation data.
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