Some sort of colour swap could indeed be helpful, an interesting idea. In my own personal experience, though, whole ranges of colours can be confusing - for me,

Some sort of colour swap could indeed be helpful, an interesting idea. In my own personal experience, though, whole ranges of colours can be confusing - for me, red, orange, green, brown can all together be problematic. And more so in some shades than others. Different colour blind people experience difference types and severities. I think we are talking about two - both good - ideas. I was thinking a "show people with working vision what stuff looks like to the colour deficient" - e.g. toggled by the press of a button. Sounds like you're thinking of a "colour management thing to help colour blind people actively change their experience". That too could be awesome, although one down side is possibly: for all that my vision is deficient, it's normal now to me, and any permanent screen filter would be very strange to work with. As far as games go, the best mechanism seems one which requires no colour vision at all: i.e. if you can still play it in black and white (TV / monitor settings), then it's 100% friendly to the colour blind. Things like textures, symbols, shapes, contrast, and blinking can all be useful when done judiciously. Of course - colour blindness is not the same as no-colour-perception. Explaining to friends and family that I don't see black and white has been a theme for me for 30+ years now :-)