'Darkness' in the Bible

Now the earth was formless and empty, and darkness [was] over the face of the deep. And the Spirit of God [was] hovering over the surface of the waters.

And God saw the light, that [it was] good, and God caused [there to be] a separation between the light and between the darkness.

And God called the light Day, and the darkness he called Night. And there was evening and there was morning, [the] first day.

and to rule over the day and over the night, and to {separate light from darkness}. And God saw that [it was] good.

And it happened, as the sun {went down}, then a deep sleep fell upon Abram and, behold, a great terrifying darkness fell upon him.