This room is so dark that I can't see anything.

He couldn't see anything in the absolute darkness.

He is preparing to explore the Dark Continent.

It is believed that dark matter makes up most of the universe.

It is said that terrifying creatures live in that dark forest.

His heart seemed as dark as pitch.

He was able to find the way in the darkness.

His heart was full of darkness.

This town is very peaceful and easy to live in.

This town has been peaceful for a long time, and it's easy to live in.