`steppenwolf-dark` is the dark version (now the only maintained version!) of a theme originally forked from [OneStepBack](http://www.vide.memoire.free.fr/perso/OneStepBack). It features dark grey window areas; black textboxes, menus, view areas, and buttons; has a nice border and corner radius on the buttons; and turquoise selection, check/radios and scrollbars. These descriptions apply to the GTK2/3 themes -- there are differences with the Qt5 colorscheme, but they don't really clash in my opinion.
* Qt5 (this is just a colorscheme intended for use with the `Breeze` theme but it actually works well. An additional `-darker` colorscheme is provided which I like to use with Kate with a solarized-like editor colorscheme)
A script is provided which installs the theme globally if run as root and for the current user only otherwise. If you know what you're doing you already know where to put the files. If you don't know where they live, you can look in the script.
