It should probably match the color of the top of the doors/rear quarter trim and the panel that the boot attaches to at the top of the seat. I had a '68 Coronet 500 convertible that was gold with a gold interior but the top of the doors and trim was black so it had a black boot. Still had the original. The top was black but that doesn't matter for the boot. The boot is supposed to be a continuation of the interior color.