Charcoal sits close to black without quite tipping into it, dramatic in the same way but with a little more warmth left in the tone. It is a colour that grounds a room rather than closing it in, which is why it works so well as a base for almost any other material you might pair it with.
Grout choice makes a real difference with a colour this dark. Match the grout to the tile and you bring out the texture of the surface itself, since there is nothing to distract the eye. Choose a lighter, contrasting grout instead and you get a bold, graphic grid pattern across the whole wall or floor, which suits a more contemporary space gorgeously.