Yup, that’s a busy (dual monitor) desktop. And more to the point, it’s all dark. Finally. For once. DoubleCommander, Firefox, Xresources, Tint2, Openbox.
For the most part, it’s based off the dark version of the Solarized palette. If you’re interested, it’s based off of Stylish scripts and GTK resources – you can check ’em out (and as I tweak them) from this GitHub repo: https://github.com/uriel1998/dark_gtk_linux