Numix is a modern flat theme with a combination of light and dark elements. It supports Gnome, Unity, XFCE and Openbox. The theme is compatible with GTK 3.6 and 3.8. It also includes a GTK 2.0 theme using Murrine engine. --- Ubuntu users can install Numix from our themes PPA using the following commands, sudo add-apt-repository ppa:satyajit-happy/themes sudo apt-get update && sudo apt-get install numix-gtk-theme --- Installation Instructions for other distros: Extract the zip file to the themes directory i.e. "/usr/share/themes/" Use Gnome Tweak tool to choose the theme, or run the following commands in Terminal, gsettings set org.gnome.desktop.interface gtk-theme "Numix" gsettings set org.gnome.desktop.wm.preferences theme "Numix" --- License: GPL-3.0+