I totally agree. Ivory with cognac is a classic, traditional combination of light paint with a contrasting interior. (The ivory steering wheel and shifter knob compliment the paint and upholstery beautifully.)
It would be interesting to determine what colors combinations were most popular, or rather most commonly used and which were not. I’m sure data exist but I’m unaware if it’s ever been published. Certainly between 1963 and 1971 tastes were changing. Silver, white, ivory and signal red seem to be the most abundant for the model. In terms of interiors, I think black and cognac were very popular.