Yaru MATE is the default GTK theme for Ubuntu MATE 21.04 and newer. This snap can be installed to appropriately theme snapped applications. There is a Yaru MATE icon theme snap to compliment this snap:
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
Install Yaru MATE
To install Yaru MATE, simply use the following command: