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,
Colour whist Colour whist Colour whist ("whist à la couleur" or "whist belge" in French or "Kleurenwiezen" in Dutch) is a Belgian variation to the card game whist. In contrast to the normal game of whist, the trump colour is determined by a bidding process rather than being the last card on the stack. The trump is determined during a first phase in the game. A player "asks" for a colour, and the next players can pass, join him, ask another colour or ask another game. The colours have a hierarchy: hearts is the most valuable, followed by diamonds, followed by clubs