'Red' in the Bible

But He replied to them, “When it is evening, you say, ‘It will be fair weather, for the sky is red.’

And in the morning, ‘There will be a storm today, for the sky is red and threatening.’ Do you know how to discern the appearance of the sky, but cannot discern the signs of the times?

This man led them out, performing wonders and signs in the land of Egypt and in the Red Sea and in the wilderness for forty years.

By faith they passed through the Red Sea as though they were passing through dry land; and the Egyptians, when they attempted it, were drowned.

And another, a red horse, went out; and to him who sat on it, it was granted to take peace from the earth, and that men would slay one another; and a great sword was given to him.

Then another sign appeared in heaven: and behold, a great red dragon having seven heads and ten horns, and on his heads were seven diadems.