My friend works for a smallish company.
After a couple of week's leave she returned to work tanned and someone told her she was "brown", meaning it as a compliment.
Boss pulled them to one side and told them you can't be calling people brown, it must be "tanned".
I'm definitely not a PC gone mad type, and try to keep up with changing language, so as not to offend, but I didn't know this one.