wikipedia

"The brown paper bag test" is a term in Black oral history used to describe a colorist discriminatory practice within the Black community in the 20th century, in which an individual's skin tone is compared to the color of a brown paper bag. The test was used to determine what privileges an individual could have; only those with a skin color that matched or was lighter than a brown paper bag were allowed admission or membership privileges. The test was believed by many to be used in the 20th century by many Black-American social institutions such as sororities, fraternities, and social clubs.[1]