Color Oracle is a free colour blindness simulator for Window, Mac and Linux. It takes the guesswork out of designing for colour blindness by showing you in real time what people with common colour vision impairments will see.
Color Oracle applies a full screen colour filter to art you are designing – independently of the software in use. Eight per cent of all males are affected by color vision impairment – make sure that your graphical work is readable by the widest possible audience.