Mid-Century Exterior Paint Colors

I've been dreaming about painting our exterior trim some more. Grey with a door that pops is my current fav.

Medium grey with a green door could look nice.
Or maybe something a little lighter with a blue door.
Is it weird if the inside of your door isn't the same color as outside? I'm not sure how either of those colors would match the living room. What color would you paint the side; the interior color or the exterior?