Pastels are basically a staple for French decor along with patterns and wood accented furniture. Rather than covering your walls with a toile or rose laden wallpaper, consider painting them pastel blue instead. Suddenly all the blues in the room will feel tied together and more styled than you ever thought it could be.
You can even think of Japanese horizontal mullions in the doors, or shoji screens that can make the place more visually appealing and guide observers around the living room. You don’t need too much living room decoration to make yourself really feel at home.