https://manpages.ubuntu.com/manpages/bionic/man1/xsetroot.1.html
Ubuntu Manpage: xsetroot - root window parameter setting utility for X
root window parameter setting utility for X
ubuntumanpagerootwindowparameter
https://manpages.ubuntu.com/manpages/noble/man1/xsetroot.1.html
Ubuntu Manpage: xsetroot - root window parameter setting utility for X
root window parameter setting utility for X
ubuntumanpagerootwindowparameter