Dh and I are white. All our children have blue marks on their bums. Ds2 has features that all of us have individually, but put together on him he looks mixed-race. So sometimes I call him "Brown Baby". Today I got jumped on by someone for doing this. She said that because neither dh nor I are black, ds2 isn't mixed-race, and so it's racist to pretend that he is, particularly to use a term that you wouldn't call a 'true' mixed-race baby.
What do you think?