As a brit that not only feels at home here, but feels 100% safer than living in London, im concerned by this question raised.
Why would someone ask that, due to their skin colour if its safe to go to a sophisticated European city? what do they thinks goign to happen? there going to stopped at customs and told to go home?
That is a kind of silly thing to say if you are white. How would you know?
If the comments I hear from Poles on public transport here in Engalnd about dark skinned ppl are anything to go by, its not somehwere I would be rushing to if I was black or Asian