We May See More Colors Than Previously Thought

"Researchers from Tohoku University's Research Institute of Electrical Communication and RIKEN BSI have found the presence of neurons in the human brain which can each selectively respond to an intermediate color; not just neurons of red, green, yellow and blue," according to a post on Medical News Today. "It was previously believed that the human visual system encoded color information through combinations of four opponent colors - red/green, yellow/blue - and dark/light components. In this format, orange can be represented as the combination of red and yellow, and purple as a combination of blue and red. However, recent electrophysiological studies in primates have revealed the presence of neurons in the visual cortex, each of which are selective to intermediate color." Read more.