Now you've got me wondering: was the parrot sketch originally in colour?
BBC2 was the first channel to have colour. It was launchd (IIRC) in 1964, very close to the 400th anniversary of Shakespeare's birth. But it wasn't in colour at the start.
MPFC started in (I believe) 1969, and I think the Parrot Sketch was in the first series. But it was late on a Sunday night on BBC1. We didn't have BBC2 because our telly was too old.
I'm pretty sure we got our first colour television in 1972, for the Olympics.
So I probably first saw it in B & W.