Use Zorin OS LibreOffice theme on any Linux OS (flatpak)

1. This pulls GTK themes including ZorinBlue-Light (light variant of Zorin OS’s blue scheme. I prefer the light themes for Libre office but you can use the other themes as well by simply swapping out the folder names.

git clone https://github.com/ZorinOS/zorin-desktop-themes.git
cd zorin-desktop-themes
ls  # Confirm ZorinBlue-Light folder exists

2. Move the theme to your local themes folder:

mkdir -p ~/.themes
mv ZorinBlue-Light ~/.themes/

3. Apply to LibreOffice Flatpak

flatpak override --user --env=GTK_THEME=ZorinBlue-Light org.libreoffice.LibreOffice

4. Set UI Mode as Tabbed under User Interface settings

COMPLETE:

The Libre Office theme should now be set to the Zorin OS one. In my opinion it looks much better than the stock theme.