This photo, by 1968Tj from the Netherlands, shows a grasshopper which officially should have been green, but is pink.
That colour condition is called erythrism. It occurs rarely, also in, eg, rabbits, snakes, frogs and birds’ eggs.
It is a bit similar to melanism making a ‘grey’ seal a black seal.
Or to a supposedly black blackbird being white or whitish because of albinism or leucism.
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