Faenza is one of the popular monochrome GNOME icon themes. It provides monochromatic icons for panels, toolbars and buttons and colorful squared icons for devices, applications, folder, files and Gnome menu items. It comes with both light and dark looks for the desktop.
Install Faenza icon theme on Ubuntu Linux
Faenza icon theme is available on the default Ubuntu repositories. So you can install it via the terminal application. Open the terminal app (ctrl+alt+t) and run below command to update Ubuntu software source list.
sudo apt update
If needed enter Ubuntu user password during the installation. Then type below command and hit enter
sudo apt install faenza-icon-theme
It will install the latest version of Faenza icon theme on your Ubuntu Linux.
Activate Faenza icon theme in Ubuntu Linux
You can easily activate this theme via Tweaks Tool. Follow the below link for Tweaks installation tutorial.
How to install Tweaks on Ubuntu
After the successful installation of tweaks open it via applications menu and go to Appearance side menu.
Choose either Faenza, Faenza-Ambaince, Faenza-Dark, Faenza-Darker, Faenza-Darkest or Faenza-Radiance Icons label under themes section.