'Dark' in the Bible

They are dark because of ice; snow is piled up over them.

The light in his tent grows dark; his lamp above him is extinguished.

why it is so dark you cannot see, and why a flood of water covers you.

In the dark the robber breaks into houses, but by day they shut themselves in; they do not know the light.

My skin has turned dark on me; my body is hot with fever.