North facing living room - what colour walls.

[Crikeyblimey]

Hi. Our sitting room is north facing and id rather 'embrace the dark' than try to fight it. We only use the room in the evenings as we have a large kitchen / dining / family room that we live in during daylight hours.
I have Browns / walnut furniture but I'm hankering after sage green for the walls. Would this work?
We are having a stone fireplace fitted next week which is a warm cream colour with a black glass fronted fire.
So - should I go for a green or maybe another colour?
As I said, I want warm / cozy (gentleman's club type feel). Pic of some of it.
Ta

On reading this post, I had to check that I hadn't written it myself. I still haven't got round to decorating my North-facing living room, which is used in the evenings and which I want to have the feel of a library/gentleman's club. I'm dithering between darkness and a deep, ochre-based cream for the walls which will glow under lamplight with green woodwork.

Sage green could work though I think rich olive is more gentlemans club in feel with some riche reds/plums as a contrast.
uk.pinterest.com/pin/20195898305123759/
Or a rich brown purple?
uk.pinterest.com/pin/318489004869237026/

That olive green is lovely, thanks.