First color TV I saw was in, if I recall correctly, about71 or 72. Very fuzzy, not worth looking at. But the first TV I bought wasn't until 77, and that was a b&w because color still wasn't a big thing then.
And since we didn't have a TV when I was growing up, I don't remember changing any tubes. But I DO remember changing vacuum tubes in the box Philco radio.
Interestingly, one of the men on the team that developed TV lived about a half mile from us, and had one of the first TVs outside the lab in his house. The electronics took up most of one wall of his house, and the screen was maybe 12" diameter, if that. He had it there mostly for testing purposes, but every now and then we would go watch something. That must have been in the late 40s or early 50s.