That’s the ABC daytime opening. The prime time broadcasts never had the “In Color” on the title card. I believe they did the same with That Girl in the network daytime reruns.
I believe ABC stopped their use with the 1970-71 season. I know That Girl (it’s final season) still had it on a bumper card.
And Bewitched with Elizabeth Montgomery’s live-active bumper.
But the following season 1971-72 the bumper dropped the “in color” part of the announcement.