Colour should not carry everything

Colour vision differences usually affect particular colour pairs. Labels, symbols and patterns make information readable without relying on colour.

Can you follow a route when colour is no longer the only clue?

Try the idea

Colour helps you tell things apart. Clear labels and patterns make the same information readable without relying on colour.

Turn the route map to grey, then add words and line patterns. Can you still follow the route?

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