However - on October 24, 1967, NBC was about to show “A Hard Day’s Night” (with the Beatles), which was filmed in black and white. The intro used a penguin (rather than a peacock), using the same announcer behind the “peacock” intro. The NBC Penguin (1967) - YouTube
I enjoyed that very much. I don’t recall it personally, but I bet it was because anyone who bought one of those new fangled color TVs would think that their sets were broken. I recall the warning at the start of The Wizard of Oz about how it starts in black and white (before the sepia toned version was commonly known).
The cynical person would say NBC pushed their color programming so that their parent company, RCA, would sell more color TVs.
Nothing cynical about that observation. NBC heavily subsidized program producers to film their shows in color, and pushed them to use costumes and scenery so vibrant they made The Wizard of Oz look like film noir. That meant NBC paid more for its programming. Parent company RCA never blinked an eye over it.
In return, RCA’s color TV advertising featured NBC programs, often Bonanza or Star Trek.