I’m a bit further south than you in Texas and have a black hardtop, it gets freaking hot inside the parked car and takes the a/c longer to cool down during the summer than my previous all white car. Granted I don’t have window tint, which surely would help, but I think another factor is the small interior volume that lends itself to heating faster/greater. It’s so bad that I’ve questioned whether the freon needs to be refilled, but after finally cooling down, I have to lower the fan speed or move the vents from pointing at me because my bare arms will get cold. Is it typical for cars with black roofs to get exceptionally hotter inside than lighter colored cars?