Greybird, A Beautiful Light Theme for Unity, Gnome Shell and XFCE

Greybird, the default theme of Xubuntu has been completely revamped. The theme now fully supports Unity and Gnome Shell as well.

Greybird theme includes:

• GTK2 theme
• GTK3 theme
• Xfwm4 themes (normal and compact)
• xfce-notifyd theme
• Emerald theme
• Metacity theme
• Mutter theme
• Unity support
• Granite widgets support (elementary OS)

To download Greybird in Ubuntu 12.04, run the following commands:

sudo add-apt-repository ppa:shimmerproject/ppa

sudo apt-get update && sudo apt-get install shimmer-themes-greybird

For other distros:

Download the theme from here.

Extract the zip file to the themes directory i.e. "~/.themes/" or "/usr/share/themes/".

Use Gnome Tweak tool or Ubuntu Tweak to choose the themes.