Opponent process

This article is missing information about details of color perception. Please expand the article to include this information. Further details may exist on the talk page. (June 2022)

The opponent process is a color theory that states that the human visual system interprets information about color by processing signals from photoreceptor cells in an antagonistic manner. The opponent-process theory suggests that there are three opponent channels, each comprising an opposing color pair: red versus green, blue versus yellow, and black versus white (luminance).^[1] The theory was first proposed in 1892 by the German physiologist Ewald Hering.