Originally I had a beachy theme for the room, hence the moody muted teal walls, but after living with it for awhile, I felt like the decor was forced, so I axed the theme. The color stayed, however, and I love how it provides a tinted, yet still neutral backdrop to the space. The majority of our house's walls are gray or white, so it's refreshing to be enveloped in color whenever we walk into our room.
Colors used in my room:
Martha Stewart Hosta (mixed to 60/70%) on the walls. Lots of natural textures, wood tones and whites. Also pops of bright green from houseplants.
Tips for using color successfully:
If you want to be super safe and flexible, pick a neutral wall color (gray/white) and just use color in the accents. But if you wanna live on the edge with brightly colored walls, I'd advise going for a slightly muted shade of the color, as opposed to an over-saturated version. I'm always surprised by how bright even the muted tones look once they are on the wall.