Emmet's construction worker vest in The Lego Movie is orange.
The bright orange vest immediately identifies Emmet as one of Bricksburg's many ordinary construction workers. His uniform helps sell the film's visual joke: although Emmet looks like an entirely typical minifigure, he becomes the character chosen to oppose Lord Business and save the LEGO world.
Emmet's orange workwear is part of his deliberately unremarkable design. He also has a standard construction-worker job, a cheerful personality, and a strong habit of obeying the instructions broadcast by President Business. These details establish him as an everyman before the story reveals that he can become a Master Builder.
The vest is sometimes confused with the yellow, green, or red clothing worn by other LEGO workers and characters. Orange is the canonical color associated with Emmet's safety vest in the film. His outfit also appears in related LEGO sets, video games, and later entries in the franchise, making the color an important part of his recognizable character design.