Colour-blind casting, non-traditional casting or integrated casting is the practice of casting a role without considering the actor's ethnicity. It derives its name from the medical condition of colour blindness. A representative of Actors Equity has disputed the use of the term "color blind", preferring the definition "non-traditional casting." Non-traditional casting "is defined as the casting of ethnic minority and female actors in roles where race, ethnicity, or sex is not germane."
The 2008 BBC television series Merlin, which employs several actors of colour in roles traditionally described in the legends as white, most notably Guinevere and Elyan the White. Africans were not unheard of in Medieval Britain and that indeed, a Moorish knight, Morien was even written of in the original legends.
In the 2005 movie The Hitchhiker's Guide to the Galaxy, Mos Def was cast as Ford Prefect, a move that puzzled many readers of the original book. Although Ford's ethnicity wasn't explicitly stated in the books, he was described as having ginger hair and the majority of readers assumed for various reasons that he would probably be white.