I think that we should list all of their hair colors even if they only have minor streaks of one of them. We could note in the templates that they only have streaks of one color, like for example:
Orange, Light-blue streaks.
Or maybe like this:
Pink, Brown and White (Streaks).
By the way, I've noticed that in some of the characters that have more than one hair color listed in their templates, the colors are separated by a comma, while in other cases, the colors are separated by an "and". I think we should fix that.