Oh I love Babouche @LenBast , we have it in our porch and it's such a happy, welcoming colour.
Our porch is only a small area, so it's only contrasted with white (doors, woodwork, shoe storage and shelving), a gold framed mirror and oak flooring too.
What colour is the furniture you'll have in your room? I agree I'm not keen on Railings either, I know it would make a striking contrast but it's just not me either.
I've been pondering other colours for our bedroom and keep coming back to Parma Gray, but for a fireplace I do also like Calke Green (which could well be the weird green you speak of!). I think either of those would be a nice contrast.
Before we paint our fireplace next month, we're going to buy a few test pots, paint a few sheets of A4 with each colour then blu-tac them to the fireplace for a few days each so we can see them in all different lights and time of day.