I'm color-sighted but my son is color blind. I find that the easiest way to remember what colors differentiate well is to remember the orange/blue colors that V

I'm color-sighted but my son is color blind. I find that the easiest way to remember what colors differentiate well is to remember the orange/blue colors that Valve chose for Portal specifically because they have the greatest visual distinction for the greatest number of people. It's also an easy shorthand, because many developers/designers know the game, so you can just say "you know, Portal colors"