Hellobee Boards

Since you're going with dark wood furniture I'd personally go with a light colour like white or light blue.

^^ Agreed with adding pops of white or brights. Since it's already brown and you want brown furniture and it's a small room, you'll need something to keep it from feeling too heavy.

We have the same color on our walls- the bottom half was painted camo by earlier owners, so we installed white wainscoting over the camo to brighten up the small space.

For color scheme, we went with browns, greens, and blues. We didn't want to get stuck in a limited color scheme, and the tan wall color helps a lot in keeping some of it neutral. We went with white furniture to give it more of an open and bright feel too.

We split the room about half nursery and half office since we are going minimalist with baby gear.

We did something similar. We have dark wood furniture and the walls are painted Cork Wedge by Shewin Williams. The lower half of the walls are in a bright white bead board. We did Pottery Barn's Sweet Lambie and the paintings on the wall are in sky blue, grass green, shades of brown/kahki, and white.