I've long been a fan of the Amenity Cove Duvet Cover ($330-395). Its big, bold design makes a definitive statement in the boudoir, and its fresh, modern color scheme is a breath of fresh air. However, its price tag makes this duvet cover a bit more of a commitment than I'm willing to make, especially since I love to switch up the look of my linens.
If you're interested in finding a similar look at a much smaller price point,
The CB2 Eden Duvet Cover ($34.95 for king) creates a similarly bold statement in white and orange. I love the outlined, embroidered florals on this cover, and the crisp look that the combination of white and orange creates. Give this cover a flip and it reverses for solid white — perfect for those of us who have a hard time making a commitment to our linens!