It was the Beatles Cartoons, which Australian animator Ron Campbell helped create-- among many other shows, before and since.
The Yellow Submarine film is known, among other things, for its bright palette of colors. But animator Ron Campbell says his contributions to the landmark movie were all done in basic black and white, with the colors added by others later in the process.

Campbell, who now lives in Arizona, is paying a short visit to Santa Rosa this week where he will be will be showing his art and talking with visitors at the Area Arts Gallery, 105 Fourth Street in Santa Rosa's old Railroad Square, Tuesday, Jan. 17th from noon to 8 pm and Wednesday, Jan. 17th from noon to 7 pm.
Ron Campbell