xsetroot(1x) on Linux
The text 40c05473db1c, as Debian 1.1 (Buzz) shipped it.
root window parameter setting utility for X
Flags it lists
-
-bg -
-bitmap -
-cursor_name -
-def -
-display -
-fg -
-gray -
-grey -
-help -
-name -
-rv -
-solid