gtk2-engines-murrine from home:tangerine:xubuntu16.04-xfce-4.12 project

Select Your Operating System

For xUbuntu 16.04 run the following:
Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).
sudo sh -c "echo 'deb http://download.opensuse.org/repositories/home:/tangerine:/xubuntu16.04-xfce-4.12/xUbuntu_16.04/ /' > /etc/apt/sources.list.d/home:tangerine:xubuntu16.04-xfce-4.12.list"
wget -nv https://download.opensuse.org/repositories/home:tangerine:xubuntu16.04-xfce-4.12/xUbuntu_16.04/Release.key -O Release.key
sudo apt-key add - < Release.key
sudo apt-get update
sudo apt-get install gtk2-engines-murrine