'Black' in the Bible

Do not take an oath by your head, because you are not able to make one hair white or black.

So the Lord replied, "If you had faith the size of a mustard seed, you could say to this black mulberry tree, 'Be pulled out by the roots and planted in the sea,' and it would obey you.

Then when the Lamb opened the third seal I heard the third living creature saying, "Come!" So I looked, and here came a black horse! The one who rode it had a balance scale in his hand.

Then I looked when the Lamb opened the sixth seal, and a huge earthquake took place; the sun became as black as sackcloth made of hair, and the full moon became blood red;