When I'm exploring the world I come across the borders of other civilizations and city states. So far I've picked up that civilizations seem to have solid borders while city states have a dashed appearance.
But how do I know whose borders they are? If I'm lucky I can see a city inside or maybe a unit working a tile, but if there are no cities or units in my line of sight and I hover my mouse I can only see the food/gold/hammers of the tile, but not who owns it.
How do I find out who owns a tile without memorizing which shade of red corresponds to which civilization?