These ebuilds come from https://github.com/defer-/deferlay.
If you have some problems, go to the official site first.
elementary-dark : subtle dark theme based on the higly popular elementary theme ( http://satya164.deviantart.com/art/elementary-Dark-GTK3-Theme-244257862 )
greybird : Grey GTK+ theme ( https://github.com/shimmerproject/Greybird )
numix-icon-theme : Icon theme from the numix project. ( http://numixproject.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a deferlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/deferlay-portage
If you have a problem : ycarus(-at-)zugaina.org