Install gnome-theme-gilouche by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-theme-gilouche
Description:
openSUSE Gilouche Theme
This theme is the default one used in openSUSE. This package provides the complete theme, consisting of icons, and Metacity and GTK+ themes. . The icon theme was previously known as openSUSE Industrial, but has been renamed to Gilouche as well.
Homepage: http://forgeftp.novell.com/opensuse-art/openSUSE11.1/metatheme/
Version: 11.1.2-2
Section: universe/gnome