Timo said:
Well, Saavik did wear command colors for some reason or another.
In TOS there were three colours. Up to a third of the crew probably wore command gold, not just Kirk. We saw lots of crewmen and women wearing gold uniforms. I assume lots of jobs, such as Records Officer Bates (in TAS) who wore gold, would be a part of the Command division. (I'm surprised yoemen didn't wear gold for their administrative duties, but in TOS red stood for the very general ship's services.)
In TMP there were six colours. Up to a sixth of the crew may have worn command white patches and epaulets, not just Kirk and Decker.
In ST II-ST VI there were at least five colours seen onscreen. Up to a fifth of the crew may have worn command white collars, not just Kirk and Spock.
ST III's Saavik wore white because she was on the Command track, as evidenced by her "Kobayashi Maru" - and white was the colour for Command division in both TMP and the movies II-VI. She also had diagonal grey slash (the inverse of the cadet red w/ command white slash she wore in ST II, where she was a cadet on the command track).
And she did seem to serve as the science officer of the mission, even if this wasn't quite explicated.
I never got the impression she was a permanent member of the Grissom crew.
Fletcher's original intentions for the division and position color schemes don't carry far in the aired reality of assorted mix-ups.
What's mixed up? We have the memos of Fletcher's intentions, and - until they seemed to lose his rule book (by about ST VI) - plenty of on-screen evidence that seems to match.
TMP: Command (white), Science (orange), Ship's operations/Helm (yellow), Medical (green), Security (grey), Engineering (red).
ST II-VI: Command (white), Science/Communications (grey), Engineering/Helm (yellow), Medical (green), Cadet (red).
As long as the original schemes cannot be completely accepted
???
By you only, I'd think.
it might be worth the effort to streamline as much as possible between TOS and TMP, or TMP and the other movies.
Why? Starfleet went from three divisions (TOS) to six and more for the movies and back to three by TNG. And there were only three in ENT. Why add layers of complication where none are needed? You can't force every ST fan to accept your wacky idea that a yellow patch in TMP suddenly means "a department head, especially when on duty on the bridge".
And we don't see yellow outside the bridge, mainly because we don't go outside the bridge much.
So? Bob Fletcher has stated what the six colours meant for TMP. He was in charge. That's good enough for me. We aren't going to get anything closer to canonical, so why not go with his word?