Hells bells what relevance does the actual colour have? Focussing on that is to trivialise the whole thing.

There are a set of people who have been systematically marginalised by a society.

A person of that descent has the willpower to say that this society, the 'cat, repeatedly appears to reflect (albeit in I hope a less strident form) that marginalisation, and to diminish reflections on it.

For shame.

We do not have to imagine racism where it does not exist, if it does not so exist, but let us think before utterances that may rankle.