Compare ST to Lost in Space (Ugh!). LIS was bad in Black and White and even worse in color. At least the ST cinematographers didn't make a joke out of using different colors to 'paint' a scene. Anyone remember the infamous LIS episode "The Great Vegetable Rebellion" or whatever it was called? Maybe it is better if you didn't see it.
Totally disagree about the ugh and the relative effectiveness of the 1st season's choice of filming in black and white. While I'm fairly certain that the rationale was cost, just like the premiere year of I Dream Of Jeannie, even though all the networks were on the cusp of having color being de rigueur for all new shows, it is widely agreed that beyond the growing Dr. Smith-centric plots and silliness that definitely didn't reach its true fruition until the 2nd season, the lack of color was integral in the perception of the show's initial serious tone, more realistic depiction of scenarios germane to the family's survival, and perhaps as well, the integrity of the greater level of the presentation of the cast as an ensemble.
It was probably inevitable that color would appear in season 2, pretty much accompanied hand-in-glove by the profusion of a fantasy orientation and the triumph of the Smith-Will-Robot troika. I would agree that the vividness of the color lent itself to the impression made by the themes, but I think it's more than a little of an exaggeration to suggest the choices made were necessarily garish and that they had much to do with the definition of the show in the last two seasons in light of the plots' substance, which was mitigated slightly by the space borne setting decision made for the last season.
I wouldn't attribute the infamy of the Vegetable Rebellion and Guy Williams and June Lockhart being kicked off the episode because they couldn't contain themselves for the palette rationale either. Stanley Adams was encased in an only slightly overly orange colored carrot suit and I personally find that Dr. Smith made an enchanting celery stalk. Obviously there was a certain something about the episode as TV Guide rated it #76 in a 1997 list of the Greatest TV Episodes Ever (City on the Edge of Forever was #92)
Be glad that you didn't get to see the prospective 4th season, which if Irwin Allen had gotten his way may very well have featured a purple llama.![]()
GR and the ST production company may have said "Ugh", too, if the idea of a Carrot Creature or Celery Stalk Man would have been proposed. Irwin Allen's concept of alien life forms came straight from the 1950's Z-movie archives.