You can also control a lot of the color schemes (backgrounds, menus, folders, etc) by using a third-party launcher. Nova gets some of the best press, but it's that good. There are a lot of them, but probably just a handful of really good ones. Those are typically the ones that appear in the regular "best of" lists here at AC.
Between a dark theme like the post above and a launcher, the only thing I can't change is the notifications shade. In my case, the remainder is black. Easy on the eyes and on the battery.