Thanks David Lee, I can’t believe I didn’t think to ask the forum.
I’m looking for a clip when Johnny Carson had a female guest on. She said something to the effect that men are not very observant, and Johnny said I’m not sure that’s true. The woman looked away from Johnny, and said “Johnny, what color are my eyes”? Johnny, of course, could not give an answer, and when the laughter died down, he said “Well played”.
Who was this guest?

Jennifer Richards, Eddie Murphy-- 1983
@4:40

IIRC, the situation was funnier because the woman in question was prominently endowed in the chest area, and wearing a low-cut blouse. Dolly Parton, perhaps? Thanks, Magna, for posting the clip while I was composing.

Thanks magna