We use colour as a signifier for people, places and things all the time. Probably more than you realise. About 8% of Australian males and 0.4% of females are colour blind. Like all people with ‘disabilities’, there are certain things colour blind people can’t do. Design can help make the world more accessible to ensure they can do everything those with ‘normal’ vision can. I explore ways to deign for colour blind users, which often improves the experience for everyone.