We are taught the rainbow is composed of red, orange, yellow, green, blue and violet, and sometimes that there are invisible colors, infrared and ultraviolet, on either side.

Studio B in Boyertown announced the opening of an invitational exhibit entitled “Roy G Biv” featuring artists inspired by the colors of the rainbow. The show opens Friday, Sept. 13, with a ...

It nonetheless appears that the notion that some colors are "primary" or purer or more fundamental than others is an artifact of culture and language. Think of that the next time you see a rainbow.