A sample of the photos used to assess the human eye’s response to natural scenes. The response of photoreceptors in the eye are helping researchers understand why our brain perceives color as a ...

In 123 years, the Crayola company has only retired a hanful of crayon colors. After protests, some were brought back.

Biologists and linguists alike have long puzzled over the universal human tendency to see and name colors as a combination of four "pure" hues—red, yellow, green and blue. Most people and most ...