The Oompa Loompas are a fictional species of small people who work in Willy Wonka's chocolate factory in Roald Dahl's 1964 novel Charlie and the Chocolate Factory. They are employed to do various tasks, such as operating the machines and testing new products. The Oompa Loompas have orange skin, green hair, and white clothes. They are known for their cheerful singing and dancing, and they often provide comic relief in the novel.