The theory of color vision proposed by Ewald Hering that is based on three systems of color opposites is called the theory

Answer and Explanation:

In 1892 he proposed the color theory in which he thought that the colors red, blue, green, and yellow are special because he thought that any other color could be a mix of the colors and they exist in different pairs.

Hope this helps out :D

they most likely have a instrumental version. just look it up on google.