Visual is irrelevant, a proper count of the actual population divided by race is needed. Cities and town in Nordic countries are designed with so much open spaces that you'll notice the only black person easily in a town of 100k population.
In America on the other hand you have endless suburban sprawl with car dependent paths hiding all the bad people from your sight. Your city can be 50% black and you still won't notice other than how packages you order online is always stolen.
Visual is irrelevant, a proper count of the actual population divided by race is needed. Cities and town in Nordic countries are designed with so much open spaces that you'll notice the only black person easily in a town of 100k population.
In America on the other hand you have endless suburban sprawl with car dependent paths hiding all the bad people from your sight. Your city can be 50% black and you still won't notice other than how packages you order online is always stolen.