When I had my car painted, they left the forward door jamb the Grigio Biacca body color. This was my fault as I had not provided sample pictures of this area as I had elsewhere. So, I took it back and paid to have this area painted the same black as the dash.
They did the work by removing the door hinge pin. Now I have a sort of "barber pole" hinge, alternating white and blacks. Oops. Failure to communicate again. I believe either the entire hinge should be black, or that it should have been masked so that the entire barrel was black, with just the tang that attaches to the door left body color. This issue remains a mystery to me, and perhaps someday I'll return to it and sort it out.
Note that the black on the front jamb continues upward unbroken into the dash black. It's one continuous surface.
My body shop did the underside of the hood and trunk lid with a coarsened black, possibly POR-15 with a kind of granulation stirred in. It closely matches what was there originally. The rest of the trunk was done with the rough black, as it is highly resistant to wear. The engine bay is not rough, rather done in a satin black.
The dash was done in eggshell, but this isn't much different than satin. The closer black is to "flat" the more susceptible it is to showing scratches. Satin black, being slightly more glossy than eggshell, might be a better choice for the dash. Simply installing the tonneau cover tends to leave visible marks. Nobody is going to know or care, so long as the dash isn't body color or glossy.
I've seen oil pans both blue green and baby-poop yellow. I chose the latter, but wonder if the blue-green might have been more "correct". Either color is quickly going to become a mixture of oil, road grime, and squirrel parts. At least the lighter colors will be quick to indicate an oil leak, but if you attempt to repair any of these you're likely to wish you simply didn't know about them. Ignorance is bliss.
I tried to establish the one, true color for the oil pan, and finally gave up. It may well be that there are no un-redone pans out there to see.