In the master bedroom of a Northern California house, a much-loved duvet cover already owned by the client was Matthew Leverone's jumping-off point. He pulled the soft, silvery blue out of its pattern for the walls, in Benjamin Moore's Aura in Silver Mist, and used a complementary fabric, Angle Lane from Robert Allen, for curtains and shades. John Robshaw's Roti pillow looks playful atop a chair in Pindler & Pindler's Ghent.