Our heritage certificate states "Twilight Blue exterior with blue interior" which leaves plenty of room for interpretation. Dad has a fairly specific memory of the seat color and grain - a navy blue with very smooth grain (I believe the sample from World Upholster is named "butterball"). We do however have questions about the headliner, vinyl, and carpets. For the headliner we are looking at grey but unsure whether it was darker or lighter. The vinyl should match the seat color? The carpets should match the seats? Note that our certificate says nothing about "duo-blue" - I've seen pictures of the "navy seats with powder blue inserts" and we did not have that. Links to any resources much appreciated.