I can see why these restorations are taking so long
!!
FWIW my little white car has the green check stuff on doors, black carpets, dash, trim panels and black seats (hence some of the spare green check items)- god knows what the seats are out of- but very comfy on long journeys and my spine needs looking after these days.
If I had my time over again and enough spare to build up a car from scratch I think I'd go with black leather everywhere; (an automotive "Sons of Marlon Brando " look) they might have had no taste in the 70's but we've all moved on and grown up a bit, for me blue and green is a no no.
I'm assuming you want to drive the thing rather than start up your own museum!! Ultimately it is what you like and want and can enjoy driving around in that counts as everyone's idea of what looks best is different, as clearly demonstrated by my thoughts and everyone elses up above!! You could probably get some one to agree with any combination discussed so far!!!!
atb
Mike
Near Penrith and the Lake District