One of the simplest ways to renew [1] the look of any room in your maison is to add a dash of color. LivingEtc has a handful of quick tips that they say [2] will "bring a room bang up to date," and give "an all white scheme" attitude:

• Line curtain panels with "a hint of luxurious colored silk."
• "Wrap chair legs in colored paper."
• Offset "a group of monochrome ornaments with a colored one."
• "Paint just part of a piece of furniture, leaving the rest white," and carry the color throughout the room by using it for lampshade trim or a cushion.
• Paint a simple stripe in one corner to add depth to the room.
• Line a cabinet with "brightly patterned fabric or wallpaper," and "use complementary accessories to pull the whole look together."

Source [3]