It's really easy to get this look. Just stay with whites and neutrals to achieve a light and airy look. If you look at the room closely you will also see that the curved sofa is soft yellow and the club chair and ottoman is a yellow, creme and soft pink check. In front of the window is a shell-covered table which I will try and show you a close-up.
The accessories are mostly shells, glass and silver with white pottery. The draperies, which I made, are silk panels in creme and soft golf checks. I just used iron on tape on all four sides and then used clips to hang. A very simple project.
If you have any questions, just ask. I'll be glad to share my ideas.