'Dark' in the Bible

For the stars of the heavens and their constellations won't shine their light; the sun will be dark when it rises, and the moon won't shine its light.

"How terrible it will be for you who go to great depths to hide your plans from the LORD, you whose deeds have been done in the dark, and who say, "Who can see us? Who has recognized us?'

I'll help the blind walk, even on a road they do not know; I'll guide them in directions they do not know. I'll turn the dark places into light in front of them, and the rough places into level ground. These are the things I will do, and I won't abandon them.