'Red' in the Bible

Then another horse went out, a fiery red one, and its horseman was empowered to take peace from the earth, so that people would slaughter one another. And a large sword was given to him.

This is how I saw the horses in my vision: The horsemen had breastplates that were fiery red, hyacinth blue, and sulfur yellow. The heads of the horses were like lions’ heads, and from their mouths came fire, smoke, and sulfur.

Then another sign appeared in heaven: There was a great fiery red dragon having seven heads and 10 horns, and on his heads were seven diadems.