This page contains screen images from that '67 season,
Captain Robert April wrote:
It appears that the black & white episodes of Carol Burnett didn't make it into the syndication package, and there's been no full series released on home video that I can find.
To my knowledge, there are no black and white episodes of the Carol Burnett Show; it was in color from the get-go. In fact, I'm pretty sure that by 1967, there were no more black & white shows in production, certainly not at the network level.
Publicity stills, however, were commonly done in b&W at this time.
which never made it to syndication, and shows that it was, indeed, black & white.
And this youtube clip
is also in B&W.