anyone have a 67 thru 69 barracuda convertible with a white interior?

I think we have figured out the original question was about rear interior side panels and not the seat backs. We've figured out those panels can be correct in 2 colors as well.
I'm going to ad this... The panels have 2 different surface textures and require 2 different finishes just like the front kick panels. The section that matches the vinyl is a flat sheen. Any glossy appearence there would come from how the texture effects the light hitting it or a little armourall.
The smooth areas should be a medium gloss. This includes the doors. You will see a high gloss just like the exterior finish put there, possibly all repainted at the same time.
So bottom line... verts rear interior panels should look like the same area of any other model. Only difference is the verts is all in one piece, again, just like the kick panels.