Need help fixing CSS for a GTK theme for Gnome Shell

Question

Using Gnome 3.8 I am now using FlatStudio as my GTK theme. After a few tweaks within /themes/FlatStudioDark/gtk-3.0/, I noticed this:

Is there any way to find classes and CSS applied to each part of a window ? I am looking for the same thing which Google Chrome developer tools provide.

Answer 1

There is GTKParasite which has a port to GTK3, but you will need to build it from source then :)