Untitled Colin Warner project (also known by the title Darker Than Blue) is an upcoming American drama film written and directed by Matt Ruskin. Based on a true story, the film stars Keith Stanfield as Colin Warner, a teenager who spent 20 years in prison for a murder he did not commit. The cast also includes Nnamdi Asomugha, Nestor Carbonell, Gbenga Akinnagbe, Sarah Goldberg, Josh Pais, Yul Vazquez, and Ron Canada.