I just installed the Arc Theme, however it doesn't look right. As you can see here, mine looks completely different and looks like it's missing textures and other things:

enter image description here

Whereas the normal theme looks like this:

enter image description here

My icons aren't changing either.

I'm activating it from the Unity Tweak Tool, and I don't know why this is happening.


2 Answers 2


This is a known issue.

This theme doesn't support Ubuntu 14.04, because its GTK version (3.10) is too old. I'm working on GTK 3.14 support, which will make the theme compatible with Ubuntu 15.04. I'm sorry about this, but I don't have enough resources to backport the theme to older GTK versions.

Source: https://github.com/horst3180/Arc-theme/issues/7


Depending on which Arc theme you are using, edit the corresponding .css file. Even better, edit all of them and fix all Arc themes on 14.04:

  • Arc: sudo gedit /usr/share/themes/Arc/gtk-3.0/gtk.css

  • Arc Dark: sudo gedit /usr/share/themes/Arc-Dark/gtk-3.0/gtk.css

  • Arc Darker: sudo gedit /usr/share/themes/Arc-Darker/gtk-3.0/gtk.css

Once gedit opens press Ctrl + F and type the word dashed

Now simply replace the highlighted word dashed with the word none

i.e. change this line: outline-style: dashed; to this: outline-style: none;

Save, close, and you're done. Enjoy.

  • :( That sucks. I wanted to use it
    – Daniel
    Commented Aug 9, 2015 at 9:39
  • 5
    Welcome to magic the world of GTK 3, where theming APIs are broken at each minor release. Commented Aug 9, 2015 at 10:54
sudo gedit /usr/share/themes/Arc-Dark/gtk-3.0/gtk.css

on line 26 comment it to be like this

/*outline-style: dashed;*/

save and enjoy


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