The Oompa Loompas are a fictional race of small people who work in Willy Wonka's chocolate factory in the 1964 novel Charlie and the Chocolate Factory by Roald Dahl. They are described as being orange-skinned with green hair, and wearing white overalls and black shoes. The Oompa Loompas are known for their singing and dancing, which they use to entertain the other workers in the factory. They are also responsible for the production of the various chocolates and sweets that are made in the factory.