Previously, I was able to edit any theme that has some content in the .css file. Mostly it was changing colors and I changed the .css file of gtk3 and it would bring the required change in color to themes. It works fine in all recent Ubuntu editions 20.04, 20.10 as well as 21.04.
Surprisingly I am unable to edit some of the themes. When I open there .css file of Mojave Dark, I get the following types of line:
@import url("resource:///org/gnome/Mojave-theme/gtk-dark.css");
How can I locally edit such type of .css file where some web address is provided in place of styling content? If there is similar tool like Oomox for Ubuntu to edit gtk themes, it would be easier. Oomox works for other themes like Materia, Numix and Arch but not for GTK.
If someone knowledgeable person knows and can help me, it would be very great.
gtk_css_provider_load_from_resource
will load particular part needed. – muru Feb 05 '21 at 07:07