Mediterranean Shiki & BeforeDawn themes are remixed versions from Mediterranean Theme Pack (GTK)

Install Mediterranean Shiki & BeforeDawn themes in Ubuntu 13.10 Saucy/Linux Mint 16/other related Ubuntu derivatives

Mediterrenean Shiki and BeforeDawn are custom blend themes of MediterraneanLightDarkest and MediterraneanTributeBlue themes which are derived from the MediterraneanNight Series Pack. The main difference between both version is metacity(borders) and rest of the theme pretty much looks same, modifier improved these themes and fixed some issues. You can use Unity Tweak Tool, Gnome-tweak-tool or Ubuntu-Tweak to change themes.

To install Mediterranean Shiki & BeforeDawn themes in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
sudo add-apt-repository ppa:noobslab/themes
sudo apt-get update
sudo apt-get install mediterranean-theme-remix

That's it

Source: Shiki, BeforeDawn