User blog comment:Creeper50/Blood Color Makes a Difference/@comment-26326346-20170128074446

How blood is described is not important at all, unless the author is going for a gore/gross effect. That said, I'd say its color doesn't matter. Blood in general is not a necessity for a creepy story. In fact, it's quite possible to have a creepy story without any blood or death in it at all (psychological terror).