Clearlooks flat compact is a “classic” looking dusty colored GTK 3.6 theme that you can use on Ubuntu 12.10 and generally Gnome 3.6.
It is very easy to the eye, with clean and simplistic design that may remind you of GTK2 times. The theme is based on Satya’s Greybird and is specially designed to use on Gnome 3.6 fallback mode!
The theme version is 0.3.1 but it already looks and works great. To install this theme, download and unzip under /home/.themes and then choose it from the Gnome Tweak Tool. For more info, check our guide on how to theme Gnome 3.