B7 is the only color code available for blue interiors on a 69 B-body. B7 Baltic Blue is not to be confused with the B7 exterior because the Baltic Blue is much brighter. The rear panel is B7 Baltic Blue as are the upper doors. The problem is matching the original. It is glossy but not glossy like the exterior it is a low gloss but not semi-flat. Here is a photo of an original B7 interior. Even though it's a hardtop, you can see what you're shooting for.