Wouldn’t be legal in the US under the 1964 Civil Rights law.
And "yes", I know about segregation and "Jim Crow" and all that crap. It pales in comparison to the evil that has been wrought in this Great Republic since people learned that you get what you want, at others' expense, if you "march" and shriek irrational demands, and riot in the streets. Martin Luther King's legacy is Antifa, BurnLootMurder, Sheila Jackson Lee, and Sam Brinton.