xstdcmap(1x) on Linux
The text f438768e3e2b, as Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo) shipped it.
X standard colormap utility
Flags it lists
-
-all -
-best -
-blue -
-default -
-delete -
-display -
-gray -
-green -
-help -
-red -
-verbose