'Red' in the Bible

But as for you, turn back and head for the desert by the way to the Red Sea."

Then we turned and set out toward the desert land on the way to the Red Sea just as the Lord told me to do, detouring around Mount Seir for a long time.

or what he did to the army of Egypt, including their horses and chariots, when he made the waters of the Red Sea overwhelm them while they were pursuing you and he annihilated them.