bsetroot(1) on Linux
The text 601745f09ec3, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
blackbox utility to change root window appearance
Flags it lists
-
-background -
-bg -
-fg -
-foreground -
-help