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 painting is a reference to Goethe’s "Theory of Colour", which explains the colour yellow as being the first colour transmitted from light. The form of the painting is circular, symbolising the construction of the human eye, changing the focus of a typical linear splitting of space to a more subjective portrayal. The colour yellow is typically optimistic, but Turner captures the negativity of yellow by attaching the colour to a light that is subject to change. The morning sun aspect of the colour is something transient. "Light and Colour" was among three paintings stolen from a Frankfurt museum in 1994.