I agree with Stoo82 here. Once 'coloured' was deemed acceptable, now it's not. Once 'negro' was acceptable, now it's not. But there is nothing in those words themselves that are hostile. It's the negative meaning that people have put into them. And what negative meaning people put in, we can take out again.
To be fair. Im not saying that coloured should ever been used to describe a black person or an Asian. But again, its just a word. BUT and its a big but i can say 'its just a word' as a white person.