'Blackness' in the Bible

Let darkness and the shadow of death stain it; let a cloud dwell upon it; let the blackness of the day terrify it.

I clothe the heavens with blackness, and I make sackcloth their covering.

Before their face the people shall be much pained: all faces shall gather blackness.

She is empty, and void, and waste: and the heart melteth, and the knees smite together, and much pain is in all loins, and the faces of them all gather blackness.