Cosmo theme from http://bootswatch.com/cosmo/ for Kotti.
To activate the kotti_theme_cosmo theme in your Kotti site, you need to add an entry to the kotti.configurators setting in your Paste Deploy config. If you don't have a kotti.configurators option, add one. The line in your [app:main] (or [app:kotti], depending on how you setup Fanstatic) section could then look like this:
kotti.configurators = kotti_theme_cosmo.kotti_configure