Speegle: So did the Factory paint body or interior base color on the bare hinges without any use of primer? Acylic Enamel base paint!
The priming took place after the hinges were attached and any sealant applied. That is why, when you remove them, the attaching surfaces (hinge and A pillar section) are often rusty and lack any sign of paint or primer
Mine is a H:code with D9 Trim. Sahara Beige with parchment interior . I believe the hinges need to be painted parchment base color just like the interior if that is correct.
The door hinges (believe that is what is being discussed) were attached to the outside of the unibody between the door and the A pillar not in the interior so they would be body color. Just like what was done in the trunk with the trunk hinges.
The exterior and interior color does not come into play thought (for an example) a red on red car could confuse or mislead someone
Should be a fair number of examples in the Unrestored picture section of the sight where the picture includes a shot of that forward door jamb on either side of the car such as these examples
And a group of pictures from four additional examples to illustrate comments above