I'm reminded of a friend of mine whose husband is red-green colorblind. We know each other through World of Warcraft, which for a very long time was awful about red and green being used to differentiate important game details.

Almost five years after game release, Blizzard finally added some accessibility options for colorblind gamers. I haven't tried them out, since I'm not red-green colorblind, but I'm glad they finally got around to doing it.