My apologies, I'm being misunderstood AGAIN.
Not "The Bible says he was like that," but the opposite... if someone had rewritten the Bible 400 years ago, the faith would be different now! This is a PSYCHOLOGICAL FACTOR. Not "it's red because of this law of nature," but "it's red because I think so"...
As for the color red, "it's all in the name." People have been giving names to things and animals since the beginning of history to make it easier to distinguish "this one with horns" from "that one with stripes." A person looks at a rose, thinks what a beautiful color! And decides to call it "red." Well, that's just a rough example. It's the same as asking, "How do you know our country is called Russia? Maybe you were just made to believe that, and we actually live in Tilimbombia!":D