Black on the color spectrum. While there’s no black in a rainbow, photons anywhere in the electromagnetic spectrum can be seen as black. Or in some cases, they can’t be seen at all!

The other colors in the spectrum, moving at their particular frequencies, are indigo, blue, green, yellow and orange. The color pink, not a part of this spectrum, does not have a particular frequency.

Colors We Can’t Even See. The visible spectrum is just a slice of the electromagnetic range. Beyond violet lies ultraviolet, and beyond red is infrared.These wavelengths are invisible to the ...

It is striking that English color words come from many sources. Some of the more exotic ones, like “vermilion” and “chartreuse,” were borrowed from French, and are named after the color of ...

Color perception, and our enjoyment of it, is part of our evolutionary legacy. The human retina is sensitive to wavelengths of light from about 400 to 700 nanometers. (A nanometer is one-billionth ...