Barry Crouch

Questions are frequently asked concerning primary and secondary colours. The answers are consistently wrong! Do those setting the questions have no knowledge of physics, and the principles of light? RED, GREEN and BLUE are the primary colours, NOT cyan, magenta and yellow. The human eye has three kinds of color sensors - they pick up Red, Green and Blue. Those are the “true” light primaries. [When we use paint, dye, ink, etc - we are mixing them “subtractively” and the primary colors are Magenta, Yellow and Cyan.]