Install GnomishBeige theme on Ubuntu 12.10/12.04/11.10/Mint (GTK + Gnome Shell)

Install GnomishBeige theme on Ubuntu 12.10 Quantal/Ubuntu 12.04 Precise/Ubuntu 11.10/Linux Mint (GTK 3 + Gnome Shell)

GnomishBeige is a clean beige theme for GTK3, based on the Adwaita engine, plus a matching GNOME-Shell theme. Its dark variant is almost identical to GnomishDark. This theme is available for (Gnome Shell 3.6/3.5/3.4 + GTK 3.6/3.4/3.2)

GTK Version

Gnome Shell Version

Theme tested on Ubuntu 12.10 Quantal Quetzal with Gnome Shell 3.6

To install Gnoishbeige theme on Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
sudo add-apt-repository ppa:noobslab/themes
sudo apt-get update
sudo apt-get install gnomishbeige-theme

That's it

Source: GnomishBeige