Why do flamingos get their pink color? When they're born, flamingos are actually gray or white. Their pink and reddish hues come from carotenoid pigments in the algae and crustaceans they eat. Without this diet, flamingos would remain pale. Zoos even add supplements to ensure captive flamingos keep their vibrant color. The brighter the pink, the healthier and more attractive a flamingo looks to potential mates. Their famous shade is literally diet made visible. | ScienceCore