WebMD explains color blindness, a condition in which a person -- males, primarily -- cannot distinguish colors.

The world is awash with the color purple — lavender flowers, amethyst gemstones, plums, eggplants and purple emperor butterflies. But if you look closely at the visible-light portion of the ...

Cones outnumber rods only in the center of the retina, which is the area of greatest density. It is also the area most ...

We have photoreceptors tuned to short wavelengths, medium wavelengths, and long wavelengths– corresponding to blue, green, and red respectively.

For decades color image sensors have almost always used a Bayer color filter array, filtering incoming light into red, green and blue wavelengths which are then captured by corresponding ...

A team of scientists in California say they have discovered a new color they named olo, but you can't see the "most intense teal" with the naked eye.

Have you ever wondered why there are no green stars in the night sky? Find out why stars are different colors.

But since some of our cones, particularly M cones, share overlap in how they respond to certain wavelengths, there are theoretically colors out there that our eyes can never truly see.

A miniature source of green laser light could improve underwater communication because water is nearly transparent to blue-green wavelengths in most aquatic environments.

The human eye does not actually see purple, as purple is not a color on the visual spectrum. Purple is a combination of wavelengths from opposite extremes of the spectrum, which technically deosn ...