As Kotaku's resident colour-blind gamer, I feel a duty to point out that some of my brethren have asked Infinity Ward to patch Modern Warfare 2 to remove the game's red-green/enemy-teammate confusion.
In MW2's multiplayer, the fastest way to differentiate friend from foe is if their name is green (teammate) or red (enemy). These colours also are used to to distinguish combatants on the game's radar. Colour-blind gamers are asking for the ability to change friend/foe colourations so they can game without confusion.
The petition points out that Call of Duty: World at War had the option of changing enemy/friendlies from red/green to orange/blue. "The Ghost Recon games have also had a similar feature. With this being such a huge release, this option should come as standard, especially when almost 10 per cent of people are affected by colour-blindness in some form."
I realise that when fewer than one in 10 men deal with this kind of vision (and half of one per cent of women) we're absolutely talking about optimising for a minority. The game is built, it's selling like nuts, updates cost money, and I'd be astonished if Infinity Ward rolled a patch for an affected population this small. And honestly, when you grow up colour-blind, you learn workarounds for the condition (on the traffic signal, top means stop, low means go.)
But, to future devs, red and green are the most commonly transposed colours in colour-blindness. Pick a different pair, and you won't have us colour-blind tugging on your pants leg with these kinds of frivolous-sounding demands.
For those curious, in that image the colour-blind are supposed to see a number 17. Everyone else should see a number 15. I can't see shit.
MW2 Patch for colour Blind Gamers Urged [Game Politics]