ppmcie(1) on Linux
The text 3078dd922ed9, as Debian 13 (Trixie), Debian 12 (Bookworm) shipped it.
draw a CIE color chart as a PPM image
Flags it lists
-
-cie -
-ebu -
-full -
-hdtv -
-noaxes -
-noblack -
-nolabel -
-nowpoint -
-ntsc -
-rec709 -
-smpte -
-upvp -
-xy