MediterraneanNight, a popular GTK3 theme pack, has been updated and it now includes 12 color variations: white, dark, blue and more.
Besides the new color variations, the latest version comes with other changes, including many redesigned widgets, new progress bar style, many fixes and also, it's no longer required to make any changes to use the themes in GNOME Shell or Unity.
The theme pack supports GTK 3.6 and thus, it works in Ubuntu 12.10 and 13.04 with GNOME Shell, the Classic GNOME session and Unity. Some of the themes included in this pack also work on Xfce: Mediterranean Dark, Mediterranean Light and Mediterranean Night (I didn't test it though).
The latest version also comes with support for Nemo from GIT:
Here are a few screenshots (they don't include all MediterraneanNight themes):
Download MediterraneanNight theme pack
As usual, the theme is available in the WebUpd8 Themes PPA, for Ubuntu 12.10 and 13.04 (since the theme is for GTK 3.6, it's not available for Ubuntu 12.04). With this release, I've removed the configuration script because you no longer need to tweak the theme for GNOME Shell or Unity.
If you want to change various aspects of the theme, see the instructions in the MediterraneanNight folder (if you've installed it using our PPA: /usr/share/themes/MediterraneanNight/readme.txt).
To add our themes PPA and install the latest MediterraneanNight in Ubunu 12.10 or 13.04, use the following commands:
sudo add-apt-repository ppa:webupd8team/themes
sudo apt-get update
sudo apt-get install mediterraneannight-gtk-theme
Our PPA includes an older MediterraneanNight release (with just 3 color variations) for Ubuntu 12.04 (GTK 3.4) and you can use the same instructions to install it.
For other Linux distributions, download MediterraneanNight from Gnome-look.
To apply one of the Mediterranean GTK3 themes, use a tool such as GNOME Tweak Tool, Ubuntu Tweak, Unsettings, etc.