This plug-in solved a serious problem for me: when I upgraded to 3.8 all the admin menus went transparent and I haven't found the reason. By using this plug-in I've been able to make the admin area decent again by picking brown from the "All admin color schemes" screen.
There still are some issues, though. The "settings" screen doesn't work. Also, I'd like to make it more contrasty with some css but I need an example so I know what I'm changing.
BTW I'm using Weaver II Pro, which may be behind my problem.