Redux is an amazing GTK3 theme for Ubuntu Unity. Having a metallic look, Redux will be appreciated by lovers of bright themes. In this tutorial we will help you install and enable Redux under Ubuntu 12.04/11.10 (Precise & Oneiric).
To install and enable Redux under Ubuntu, run the following commands:
cd /tmp && wget -O redux.zip http://goo.gl/hVydH
unzip redux.zip -d ~/.themes
gsettings set org.gnome.desktop.interface gtk-theme 'Redux'
gconftool-2 --set --type string /apps/metacity/general/theme 'Redux'
You can improve the look of this theme more by using an icon theme from this link. For theme source, check here.