I grew up in a fairly small, segregated town in west central Missouri.  The elementary school I attended didn't have any students or teachers of color until about 1970.  The first African-American children that I met was when I played Little League baseball around 1967 - I noticed that some adults referred to them as either "colored" or "negro" kids.  It was in the late 60's when an interracial couple were married and bought a house in an all-white neighborhood - many adults seemed to be appalled.