Colour deficit help

The fundamental solution to this problem, which also helps people with no colour perception, is to not rely on colour alone to convey information—use position, size, shape and other visual characteristics (as well as a textual equivalent for people who cannot see).

Many people in the world have some difficulty in perceiving colour. A very well-known condition is “red-green colour blindness” (there are actually two different sub-types of this, deuteranomaly and protanomaly), though there are several other types of colour deficit.The fundamental solution to this problem, which also helps people with no colour perception, is to not rely on colour alone to convey information—use position, size, shape and other visual characteristics (as well as a textual equivalent for people who cannot see).

Some computer games offer settings to make things clearer for people with colour perception difficulties. Frozen Bubble, for example, involves matching bubbles of different colours. A range of colours are used and, whilst they are quite close to the primary colours, they could be hard to discern. There is an option to include prominent shapes within the bubbles, so that shape can be used as a differentiator too.

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