Astro Black has a lot of blue metal flake in it, some even call it Astro Blue. Black for a roof is Black, unless it is an Astro Black car with a Black roof.
They'd be Roof Black, much like the Clubman rear c-pillars when they're Black.
And Roof Black is actually the old Jet Black from the original first Gen's. No flake, no sparkle...just good old fashion Black. Dropping that color was a big mistake IMO.
A little interesting fact. Hot Chocolate Brown is actually the original Jet Black paint, with large amounts of gold flake and red/magenta tints.
