White, pale green, soft yellow, sea blue, tan. A leafy wallpaper maybe?

But, I think the wall color is fine, the room just needs some more fun. See if you can change the window treatments and get a colored (or light grey) area rug under the sofa and lounge chairs. Paint the bay with the two rocking chairs in it a bright color from the rug, so not the entire room is the same shade/color.