Color blindness is added the majority will say that a match has been achieved. Finally, as yet more red is added, the remaining, protanomalous, observers will declare a match at a point where normal observers will see the mixed light as definitely reddish. Protanopia, deuteranopia, protanomaly, and deuteranomaly are commonly inherited forms of red-green color blindness which affect a substantial portion of the human population. Those affected have difficulty with discriminating red and green hues due to the absence or mutation of the red or green retinal photoreceptors. It is sex-linked: genetic red-green color blindness affects males much more often than females,
Light and Colour (Goethe's Theory) – The Morning after the Deluge – Moses Writing the Book of Genesis depicted their relationship in a number of his paintings, including "Light and Colour (Goethe's Theory) – the Morning after the Deluge – Moses Writing the Book of Genesis". According to this theory,the creation of colour is dependent on the distribution of dark and light reflecting through a transparent object. Turner uses main concepts from Goethe’s theory, which is a rejection of Newton's Seven Color Theory, and expresses the belief that every colour was an individualised combination of light and darkness. Newton's reasoning in his theory of light and colour was, in the words of Michael Duck, too "simplistic" for Goethe.