I’m re-watching Dark Shadows right now on Tubi, and just got past the change from B&W to color. Interestingly there are some episodes after the change that are still in black-and-white or kinescope because those are the only prints they had of certain episodes. It’s amazing that someone had the foresight to keep DS for future showings, all 1225 episodes of it.
It was very fun to watch through. There is one missing episode though(#1219). They did a kind of recreation, but it was not very good.
You probably figured out that the Dark shadows episodes were divided up into two programs on Tubi I believe is were I watched it. I think that it was the first 6 seasons that were in there own group.