In a coastal living room, blue is the obvious paint choice for walls but you might not realize how essential it is. Since you want your space to mimic the feel that the ocean gives you, blue is instantly calm against your creamy whites and natural accents, making you feel cool and relaxed like the ocean does.
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.