simple 2560*1600 desktop wallpaper based on ubuntustudio wordmark at wiki.ubuntu.com/UbuntuStudio/Artwork/UserShowcase. low resolution for small file size. use inkscape with gradients.
matching plymouth splash theme at https://www.opendesktop.org/p/1176419/
matching firefox theme at https://addons.mozilla.org/en-US/firefox/addon/ubuntustudio-suadewm/