"Grey Is Beautiful" is not an episode of the TV series Operation Petticoat, but it is a well-known episode from the 1959 film of the same name, starring Tony Curtis and Cary Grant. In this film, a character named Lieutenant Dolores Crandall (played by Joan O'Brien) asks the other characters to find a way to make their submarine look like something other than its bright pink color, leading to a humorous and "grey" color scheme.