English: 'Negro drinking at "Colored" water cooler in streetcar terminal, Oklahoma City, Oklahoma' - 35mm nitrate negative of a photo by Russell Lee, depicting the seperate but equal era.

Title kept original; obviously language has moved on. (See the Wikipedia article on the term for the history, but long story short, the history of terminology for African-Americans has a lot of once-acceptable terms that are not acceptable today. Roughly speaking, they go out of favour once racists start using them: For example, signs like these were not helping the term "colored people" not get laced with racist connotations, despite a few decades earlier it being used in the name of the NAACP.)

Note that, while there is a theoretically higher-resolution source, File:"Colored" drinking fountain from mid-20th century with african-american drinking.jpg, that has some severe damage, like the blur on the left side (below the hand on the sign).