Sway Black-Base ORANGE: A Nice Dark GTK3 Theme for Unity and Gnome Shell - Ubuntu 12.04/Linux Mint 13 (Maya)

Sway Black-Base ORANGE is an elegant GTK3 theme that uses a striking combination of black and orange colors. The theme can be enabled under Unity and Gnome Shell. Here is a screenshot of Sway Black-Base ORANGE under Ubuntu 12.04 (Unity):

Sway Black-Base ORANGE Installation

To install this theme under Ubuntu 12.10/12.04/11.10 or Linux Mint 13 (Maya), open the terminal and issue these commands:

sudo add-apt-repository ppa:upubuntu-com/gtk3
sudo apt-get update
sudo apt-get install sway-black-orange

You can use Gnome Tweak Tool to enable it, or run these two commands:

gsettings set org.gnome.desktop.interface gtk-theme 'Sway Black-Base ORANGE'

gconftool-2 --set --type string /apps/metacity/general/theme 'Sway Black-Base ORANGE'

Theme source: gnome-look