The color of a polar bear's fur is actually colorless and appears white due to its unique structure. The fur consists of hollow, transparent hairs that reflect visible light, giving the bears their characteristic white appearance. This adaptation helps polar bears blend into their icy and snowy environment, providing them with excellent camouflage when hunting seals and other prey. Underneath their fur, polar bears have black skin, which helps them absorb heat from sunlight. The fur and fat layers provide insulation against the harsh temperatures of their Arctic habitat.