Here's a little before and after of a sunroom we recently refreshed.
Dark walls, an undersized rug, and monochromatic drapery made the sunny room feel small and heavy.
After: A painted beam and shiplap ceiling was added. The existing club chairs were reupholstered, and a skirt added to give them a more tailored look. New drapery (from Thom Filicia for Kravet), and a fresh new wall color (Mega Greige from Sherwin Williams) and a larger, brighter rug, make a huge difference!