I think the cool grey walls work so refreshing in this beautiful Swedish home. The living room wall color is a very cool (almost blue) grey, which is warmed up by a variety of warm accents in the accessories and furniture. The sheer beige curtains* warm up the daylight that is coming through those big windows. The black in the art prints, lamps and the bentwood dining chairs adds contrast to this look and I love the big mirror at the dining table, which reflects the daylight and makes the room look bigger.
The bedroom has been painted in a warmer grey, but also here you have a beautiful mixture of cool and warm tints. The cool grey in the duvet cover stands out and the black wall lamps combine so nicely with the wooden bedside tables.