Young-Helmholtz
From The Glossary of Digital Photography
A color theory based on the three colors of red, green, and blue. Thomas Young and Hermann von Helmholtz developed this theory during the 19th century based on their on their idea of how the photoreceptors, or cones, in the human eye work. Young and Helmholtz believed that the human eye is sensitive to the three colors, that there are three types of cones in the human eye, and that each type is sensitive to one of the colors. It took more than one hundred years for their theory to be proven.
