How is this a trope? It's not a trope, it's just someone's hair color.

I could've sworn this article was once much longer, with a page quote, and a commentary on the media depiction of redheads over time. Was I mistaken?

It says on the main page that heroic redheads tend more toward lighter/red-blonde hair, while villains veer more toward darker/auburn hair. If that's the case, then couldn't a trope exist for Red Headed Heroes (and maybe villains too) whose hair color is a literal shade of red? I don't know, it seems like an idea.