From Don Bunn's book,
1951-2 models sported a new two tone interior-seats were deep rich brown vinyl, while roof,quarter panels, door panels were light tan. 1953 trucks had a light tan roof/quarter panels with dark brown seats and door panels matching. 1953 trucks had door panel binding a different color than the panel itself-kinda nice looking too!
As for the park lamp bezels- chrome was used on the 1951-3 "Spring Specials" and all regular 1953 trucks. 1951-2 used both body color and black bezels. I think both ways are correct. Remember it's just an old dodge truck! As for the grille center medallion factory colors, some were painted silver with red lettering, some were chrome-I think 51's only? and have seen some painted yellowish beige like the factory wheels.
I just redid my 52 Dodge PU door and kick panels in a medium heavy duty truck grade medium brown vinyl purchased from "Perfect fit MacDonald" a wholesale upholstry supply outfit here in the Seattle area. Bought the materials and stitched them up. Not exactly as the original but looks correct enough. Still have the seat and the visors to do .
Some pic's of the factory installed chrome 1953 park bezels and my finished door panels, and a members original door panel with the 610T radio!
Bob