Recently I found a dark-theme for GNOME Shell, which makes it much less tiring when working with the PC for a longer time. Its name is Adwaita Dark, made by Felipe Cabargas. It can be downloaded here. The contents of the file need to be copied to a subfolder in /usr/share/themes/, e.g. by executing the following commands

tar -xzf Adwaita-Dark.tar.gz
sudo cp -R ./Adwaita\ Dark/ /usr/share/themes

Changing your GNOME theme

Now an easy way to change your theme is using the gnome-tweak-tool. If you haven’t already installed it just do so by executing sudo apt-get install gnome-tweak-tool

Some additional help on it can be found here.

After you installed it, select “Theme” in the left list and select “Adwaita Dark” from the dropdown option “GTK+ theme” on the right. The theme should be applied immediately, if it is not just hit ALT+F2 and enter “r”. This will restart GNOME-Shell.

Coloring problems

I encountered coloring-problems with some programs, e.g. the background of the Ubuntu Software Center does not adapt to the theme correctly, such that you will not be able to read text. You can fix this by manually changing the css-file of the Ubuntu Software Center. The whole procedure can be found here, in short you have to edit the file “/usr/share/software-center/ui/gtk3/css/softwarecenter.css”:

sudo vi /usr/share/software-center/ui/gtk3/css/softwarecenter.css

and replace

@define-color light-aubergine #DED7DB;
@define-color super-light-aubergine #F4F1F3;

by e.g.

@define-color light-aubergine #DED7DB;
@define-color super-light-aubergine #B4A66F;