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.
Take a deeper look at corners, and you will notice they can be given a purpose as well. Look at as many interior design images as possible before you start planning, in order to acquire the right inspiration. Sometimes even an Indian arch design for living room can offer an idea for your interior decoration living room.