Dorothy's nails were painted her signature color frost white through out the film. When she was taken to the ambulance her nails were bright red. This was the only time they were red.
Dorothy Dandridge collapses onstage at the Mocambo nightclub in 1961 or 1962. The club closed in the late 1950s.
Otto Preminger tells Dorothy Dandridge that Carmen Jones (1954) is the first major studio movie to feature an all-black cast. MGM's Cabin in the Sky (1943) was released 11 years earlier.
In the party scene that takes place in 1951 (the year Dandridge made a Tarzan movie), Dorothy Dandridge, Marilyn Monroe, and Ava Gardner all introduce themselves. Ava Gardner was a big star by 1951, as famous for her movies as for the affair she was having at the time with future husband Frank Sinatra, and would be instantly recognizable.
Sprite soft drink bottles appear on the set of a movie shot in the 1940s. Sprite was first marketed in 1961.
Minutes before she is to take the stage in Miami, Dorothy Dandridge discovers that the club is still under construction. Her act involved a good deal of choreography and perhaps even rehearsal, so she should have been aware. At the very least, she would have checked out the stage to get the physical layout of the performance space before she made her entrance.
Dorothy Dandridge's first husband, Harold Nicholas, was about the same age (1 year older). Obba Babatunde was too old to play a 20-ish Harold Nicholas and was also obviously older than the actor who played his older (by seven years) brother, Fayard. Babatunde likely got the part due to his dance skills and his acting experience.