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,
Palatinate (colour) Palatinate (colour) Palatinate or 'palatinate purple' is a purple colour associated with Durham University. It is used in the academic dress of Durham University and in the faculties of medicine and law at Newcastle University (being a former college of Durham University). The term has been used to refer to a number of different shades of purple. The Oxford English Dictionary defines it as a "light purple or lavender colour", which is used for Durham (and Newcastle) academic hoods. For corporate purposes Durham University uses a darker shade. A separate colour, 'palatinate blue', is derived from the Coat of Arms