As Chicagoland was beset with race riots in the 60's, I worked for a mail order house where 95% of the employees were black (word of choice then). In my department,there were jokes. Like "take a Honky to lunch." But when there were major problems (Dr. King's assassination, Bobbie Kennedy's assassination, and the near demise of the Democratic party at its presidential convention), we went symbolic. On the rough days, we wore clothes of black and white. Some enterprising florists learned to make carnation bouquets.
As time wore on and Jesse Jackson had major press for his Operation Push, rainbow colors seemed appropriate. If a person feels shunned, disadvantaged or threatened because of his/her outward appearance, and the reason is as much words--whether because of skin color, place of birth, linguistic accents, or unkind name calling--I'm inclined to look at it the way Dick Gregory advised his mother. "Mama, if they call you a nigger just remember they are talking about my book."