An island in the Pacific has a unique genetic history that affects how it understands color. Pingelap Atoll, the Micronesian island in the South Pacific, sometimes goes by its other name, The Island of the Colorblind. That’s the moniker Oliver Sacks assigned the island in his 1996 book that explored the human brain.

Source: On the Island of the Colorblind, Genetic History Affects How Residents See Color