Hey mdawg, welcome to 60Patrol!
That's a good question! I don't know if any of the colors Datsun offered were only ever used on the Patrol. I'm not sure how to get a quick answer on that. I am pretty sure that some of the colors weren't offered for the Patrol, like black and Spanish Red.
The interior of hard top Patrols (and the engine compartment and undercarriage) was painted gray. I don't know that there was ever a color code given for the gray, but if I had to guess I would say the 503 or the 666 gray. I do know that Duplicolor rattlecan gray is extremely close.