Install blubuntu-theme by entering the following commands in the terminal:
sudo apt update sudo apt install blubuntu-theme
Description:
Blubuntu look - GTK+ and Metacity theme
The Blubuntu theme. . This package contains the GTK+ and Metacity configuration for the Blubuntu look.
Homepage: https://launchpad.net/blubuntu-look
Version: 0.3.1
Section: universe/x11