'Dark' in the Bible

Then the prince, who will be one of them, will carry his luggage on his shoulder in the dark and will go out. They'll dig a hole in the wall for him to go through. His face will be covered so that he won't be able to see the land with his eyes.

It will be a dark day for Tahpanhes when I break the yokes of Egypt. That's when her arrogant power will come to an end. She'll be covered by a cloud, and her citizens will go into captivity.