What colour to paint the architrave around our glossy black doors?

If everything goes according to plan, MrB will be painting the front doors, frame and door step this weekend. The doors and frame will be glossy 2 pack black, and the wooden door step will be stained. (By the way, any recommendations as to what product to use?)

My main concern now though is what colour to paint the architrave on the inside, surrounding the door? The rest of the doors, architraves and skirting boards will all be white (well, gloss Whisper White to be exact). But since our front doors will be black both on the outside and inside, does that mean the architrave around the door should also be black? Or will it look perfectly fine if it's white, the architrave that is? I am confused, as usual... :(

B