What is the correct color for 67-68 lower door vents

Yes sir these here, I stole this pic. my old ones were painted on the door red and they looked burned?
Like they came off a car that was in a fire burned all funked up and now is my chance to replace them.
I painted them red in 1991 so I can only blame myself.

doorvents.JPG

I have a set all tore apart and ready to go back right. the black is ugly in the red door and I am set to dye them red.
I have a bunch of books, restoration books but no mention of this vents color that I can find.