[Charles Martel]

I suspect that all of the TV networks were seeking shows that would best showcase the emerging color television market, too - I believe either RCA or Zenith actually used a Star Trek still image in a print ad. It's no coincidence that the show made extensive use of primary colors on the set. Even the uniforms were a bit bolder in color, compared with the ones used in the first pilot.

The first episodes that I saw - during the show's original run, - were on a black & white TV. By the time syndication re-runs began, a lot more of the viewing public had color TVs, which added to the surge in popularity.

[PghBaldy]

I remember how exciting it was to see color TV shows.

[Mr. K]

I don’t believe Star Trek ever had any black and white episodes

[political1]

My parents were not rich , but I guess they could afford nicer things. One might say we were upper middle class. That being said, it wasn’t until 1974, they finally bought an RCA color tv set. Big box wooden set. They grew up in the depression and spending that kind of money for a tv set seemed outlandish to them. They shopped around for Two months. Back and forth between Sears and other stores. Came home from school one day, and that big box tv was sitting in the living room. They moved the black and white tv down stairs in the play room. The first show I watched that afternoon was Gilligan’s Island. I had seen every Star Trek episode on that old black and white, but it was fun seeing them again in color in reruns.