Why should it be offensive to say someone is black, white,brown, red, or even blue ( if a case ever occurs). I have seen some people of African ancestry who are white and Caucasians who are brown. When my marshmallow white brother laid out in the sun and hobbled inside burnt from head to toe I was correct in saying he was red. If a person is that sensitive about something mundane as skin color, then it would appear they view in rather racist terms.
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"Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth." - Marcus Aurelius