fbsetroot(1) on Linux
The text e0bfc113cd67, as Debian 7 (Wheezy) shipped it.
a simple background utility used by the fluxbox(1) window manager, originally written for and by the original blackbox(1) window manager.
Flags it lists
-
-background -
-bg -
-display -
-fg -
-foreground -
-from -
-gradient -
-help -
-solid -
-to