Yeah, I'm not real sure many would appreciate the differences in faces or hair styles/color.
On my server I have some recognizable names from stories or movies and I like to make the NPCs somewhat resemble the names (Titus Pullo did not have green hair).
Most probably don't care.
In any event, I found in the db where the fields are: npc_types table, face, luclin_hairstyle, luclin_haircolor, luclin_eyecolor, luclin_eyecolor2 (1 for each eye?), luclin_beardcolor, and luclin_beard.
I can use these as is, but have to close the table each change and zone to see what my randomly plugged numbers create.
Not sure if there is a #command to reload the selected npc and have the changes immediately apparent. Tried a few and none seemed to do what I wanted. Not sure the effort would be worth it if I'm the only one who cares about hair color