'Fiery red' in the Bible

And he having answered, said to them, It being evening, ye say, Calm weather: for the heaven is fiery red.

And in the morning, It will be tempestuous to-day, for the sky is gloomy and fiery red. Ye hypocrites, do ye know how to discern the appearance of the sky, and are ye unable to discern the signs of the times?

And another horse came out--a fiery-red one; and power was given to its rider to take peace from the earth, and to cause men to kill one another; and a great sword was given to him.

And thus I saw the horses in the vision, and those who sit on them having breastplates fiery red, and of hyacinth color, and sulphurous. And the heads of the horses are like heads of lions, and out of their mouths come fire and smo

Then another sign [of warning] was seen in heaven: behold, a great fiery red dragon (Satan) with seven heads and ten horns, and on his heads were seven royal crowns (diadems).