I've been in your shoes. It's not that bad. http://www.seriousgmod.com/threads/switch-mvp-color.22719
Wait, Gun isn't a mod anymore?... ...wait, Gun WAS a mod?? Anyway, I think changing it to be a bit greener can do the trick.
I mean a lot of the colours need looking at, they're vomit inducing, theirs a reason people buy Legendary for the colour.
but like, we can't really change the colors to another color, we can only change them to a different shade of the current color unless we switch two of them.