Nice one-liner! Personally, I like the new "funky" green, but good job nonetheless!
Here's a more comprehensive @include list you can use:
// @include http://*.stackexchange.com/questions/*
// @include http://answers.onstartups.com/questions/*
// @include http://askubuntu.com/questions/*
// @include http://meta.askubuntu.com/questions/*
// @include http://meta.serverfault.com/questions/*
// @include http://meta.stackoverflow.com/questions/*
// @include http://serverfault.com/questions/*
// @include http://stackapps.com/questions/*
// @include http://stackoverflow.com/questions/*
// @include http://superuser.com/questions/*
An up-to-date list is available at Complete list of sites to @include / @match into my script?