Colourists contribute to the mood and look of a film by defining its colours. They work with the director and director of photography to decide the palette; whether it's restrained or hyper-coloured, whether it uses milky colours or primary ones.
A film colorist is the post-production technician responsible for designing a film's color scheme in order to achieve a specific style or mood. After a film is shot and edited, the footage is sent to the film colorist
Colorists are post-production technicians who adjust the color, tint, and hue of the final product. They work alongside the director and the cinematographer to ensure the film or show looks exactly how the director wants it to