Sonny said that the director told all of the Indian actors that they had to be sprayed with chocolate colored paint because it would make them more photogenic. “One morning they rushed me into a tent and told me to take my shirt off and they started to spray me with the chocolate paint and we heard a shriek and some terrible cussing and discovered that we were in Susan Ball’s tent and she was hysterical that they would have the nerve to paint me in her tent,” Sonny said.
So Hollywood used Native actors to play Indians but made them darker. It also used white actors to play Indians but didn't make them darker. Sounds mixed up to me.
For more on the subject, see The Best Indian Movies.