When you take away a texture or two, brightly colored quilts and pillows that have interesting textures of their own stand out and look absolutely stunning.
1. Keep things toasty. To keep your guests comfortable on cold nights, make sure they have ample blankets and an extra quilt on the bed. Consider your window treatments. It may just be a matter of adding a simple roll shade to make sure your guests get the privacy they need and won't be awakened at the crack of dawn.
Headboards are another piece of furniture that can be given the slipcover treatment. In this cute bedroom by Tracery Interiors, each twin bed has a simple headboard with a white slipcover for a casual, crisp finish.More:So Your Style Is: CottageYour Guide to Stylish SlipcoversHouzz Tour: Farmhouse Chic in San Francisco
Poss for ETO room do-over. Use pale cream//butter walls, address the drafty windows, light/white covers are simple and then pop the look w/throw blankets and pillows. Looks here that they used headboards to cover windows?
The shades keep the room less formal. By changing the linens, one could go coastal; contemporary, maybe paired with a dark color and white; or country cottage.
Here's another company that has some that are similar: http://www.magnoliainteriors.com.au/shop/shop/7/cat/54/page/12/