'White' in the Bible

I saw in the night, and, behold, a man riding upon a red horse, and he stood among the myrtle-trees that were in the bottom; and behind him there were horses, red, sorrel, and white.

and in the third chariot white horses; and in the fourth chariot grizzled strong horses.

The chariot wherein are the black horses goeth forth toward the north country; and the white went forth after them; and the grizzled went forth toward the south country.