Impossible colors or forbidden colors are hues that cannot be perceived in ordinary viewing conditions from light that is a combination of various intensities of the various frequencies of visible light. Examples of impossible colors are bluish-yellow and reddish-green. This does not mean the muddy brown color created when mixing red and green paints, or the green color from mixing yellow and blue paints, but rather colors that appear to be similar to, for example, both red and green, or both yellow and blue. Other colors never experienced in ordinary viewing, but perceivable under special artificial laboratory conditions, would also be termed impossible colors.
http://en.wikipedia.org/wiki/Impossible_…
Scientific American Magazine » February 2010
"Impossible" Colors: See Hues That Can't Exist
People can be made to see reddish green and yellowish blue—colors forbidden by theories of color perception. These and other hallucinations provide a window into the phenomenon of visual opponency.
Red and green are called opponent colors because people normally cannot see redness and greenness simultaneously in a single color. The same is true for yellow and blue.
Researchers have long regarded color opponency to be hardwired in the brain, completely forbidding perception of reddish green or yellowish blue.
Under special circumstances, though, people can see the “forbidden” colors, suggesting that color opponency in the brain has a softwired stage that can be disabled.
In flickering light, people see a variety of geometric hallucinations with properties suggestive of a geometric opponency that pits concentric circles in opposition to fan shapes.
http://www.scientificamerican.com/articl…
“Hiding in the shadows between the colors we see everyday are weird, impossible shades, colors that you shouldn’t be able to see and generally don’t…unless you know how. Here’s a simple guide to seeing impossible and imaginary colors. Understanding a little about how humans perceive color is crucial to seeing impossible colors.
Our eyes use something called opponent process to work more efficiently. This plays upon the fact that the eye’s primary light receptors, the cones, have certain overlaps in what light wavelengths they can perceive. To save energy, our eyes measure the differences between the responses of various cones rather than figuring out each cone’s individual response.”
http://mostlytech.wordpress.com/2010/12/…
http://en.wikipedia.org/wiki/Impossible_…
Scientific American Magazine » February 2010
"Impossible" Colors: See Hues That Can't Exist
People can be made to see reddish green and yellowish blue—colors forbidden by theories of color perception. These and other hallucinations provide a window into the phenomenon of visual opponency.
Red and green are called opponent colors because people normally cannot see redness and greenness simultaneously in a single color. The same is true for yellow and blue.
Researchers have long regarded color opponency to be hardwired in the brain, completely forbidding perception of reddish green or yellowish blue.
Under special circumstances, though, people can see the “forbidden” colors, suggesting that color opponency in the brain has a softwired stage that can be disabled.
In flickering light, people see a variety of geometric hallucinations with properties suggestive of a geometric opponency that pits concentric circles in opposition to fan shapes.
http://www.scientificamerican.com/articl…
“Hiding in the shadows between the colors we see everyday are weird, impossible shades, colors that you shouldn’t be able to see and generally don’t…unless you know how. Here’s a simple guide to seeing impossible and imaginary colors. Understanding a little about how humans perceive color is crucial to seeing impossible colors.
Our eyes use something called opponent process to work more efficiently. This plays upon the fact that the eye’s primary light receptors, the cones, have certain overlaps in what light wavelengths they can perceive. To save energy, our eyes measure the differences between the responses of various cones rather than figuring out each cone’s individual response.”
http://mostlytech.wordpress.com/2010/12/…
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So, you want us to give you names of colors that no one has ever seen ... and therefore, no one has ever named? Does that make sense to you?
Now, if you want someone to simply give you wavelengths of electromagnetic radiation beyond the ability of the eye to see, that is a different question.
A typical human eye will respond to wavelengths from about 390 to 750 nm.[1] In terms of frequency, this corresponds to a band in the vicinity of 400–790 THz.
http://en.wikipedia.org/wiki/Visible_spe…
Now, if you want someone to simply give you wavelengths of electromagnetic radiation beyond the ability of the eye to see, that is a different question.
A typical human eye will respond to wavelengths from about 390 to 750 nm.[1] In terms of frequency, this corresponds to a band in the vicinity of 400–790 THz.
http://en.wikipedia.org/wiki/Visible_spe…