Thank you guys for all your input.
From the photo, the Anthracite silver color actually looks like black when the car is indoor.
Got a reply from my dealer saying that the Anthracite top is a standard equipment for M40i in Hong Kong and it is difficult for them to change it back to Black. Even if they can, they will have to charge me.
my build will be a Sapphire Black with the cerium trims and an Ivory interior......hope it works out