You can change it to a dark grey in 2013 if you dig through the settings. Just what's there doesn't warrant getting a copy for myself at home ya know.
It's not even that "dark" of a grey still lol. I was kinda miffed about that...but got used to it. I still haven't tried 2016, but eventually I'll probably install it on my work laptop (MSDN, woot woot).