That was used as a great scene in “Shaft”...
John Shaft: Warms my black heart to see you so concerned about us minority folks.
Vic Androzzi: Oh come on Shaft, what is it with this black shit, huh?
[Vic holds a black pen up to Shaft’s face]
Vic Androzzi: You ain’t so black.
John Shaft: [Holds a white coffee cup next to Vic’s face] And you ain’t so white either baby.
See there?