Various forms of colour blindness can distinguish between red and blue, using red and blue as colour scheme improves things for something like 2 or 3% of the po

Various forms of colour blindness can distinguish between red and blue, using red and blue as colour scheme improves things for something like 2 or 3% of the population, there are more people with colour blindness issues in the world than there are linux + mac users! If the game is worth being made for linux and mac, it is also worth having a red+blue colour scheme, and indeed many games have this scheme used by default or as an option.