In certain countries, people wouldn't use the word 'black' as it might lead to discrimination issues. It is common in AmE that one would say <<African American>> instead of using the word 'black'.
I hope I don't offend anyone, but When white people get sick they turn green. When white people have hepatitis they turn yellow. When white people can't breathe they turn blue. When white people are embarrased they turn red. When white people get terrified they turn pale. When white people sunbathe they turn brown.