1950s Popeye is the safest guess.
Or... Barney Bear, Happy Harmonies...
Or... Tex Avery Screwball Classics volume 4 featuring his Warner Bros. one-shots; of course not featuring the most un-PC ones.
The fact that Jerry referenced a phrase from Lucky Ducky does not imply anything. The guy is an animation historian who has Lucky Ducky as one of his favorite cartoons, and he also happens to be working on restoration projects of Technicolor cartoons; "Technicolor ends here" just came to his mind, I don't think that was planned, or a hint, or anything.
I always come to TTTP in Exile in the hope of finding news about Warner announcing Tex Avery Collection.