There are ganglion cells in the retina that fire at a high r…

There are ganglion cells in the retina that fire at a high rate when seeing red but at a slow rate when seeing green. This is why if you stare at a green circle for 30 seconds, these ganglion cells get tired so when you then stare at a white surface, you see a red circle for a few seconds. This is known as the __________ theory of color vision.