Jazz Tangcay Artisans EditorFrom the onset, “Promising Young Woman” director Emerald Fennell and production designer Michael Perry had decided that bright candy colors would be the foundation for the film.Carey Mulligan plays Cassie, a young woman wounded by events from her medical school years who decides to take revenge on the men who caused her best friend unimaginable pain.Blues and pinks were key. For the coffee shop where Cassie holds a day job, Perry was inspired by French bakeries.