Decorating is a lot like dressing. Your home decor has seasons like your wardrobe. I try to display this through pillows on my sofa and chair and changing out comforters between the spring/summer and fall/winter seasons. Most of us can't go out and purchase new furniture every season (wouldn't that be nice), but we can do simple, inexpensive things to change the look in our spaces.
To change the look of my bed for the spring and summer months, I always put a coverlet on the bed. Coverlets are lighter in weight and come in a variety of colors. Depending on where you shop, they can range in price from $30 up to $200. In Little Rock, AR, we have a store called Garden Ridge. I can find coverlets for $30. I've had the coverlet and European shams currently on my bed for several years. I think I purchased it at Bed, Bath, and Beyond. It's a little nicer than the ones found at Garden Ridge. I haven't used it in a number of seasons. But, with the new comforter I purchased last winter, I thought it would be good to use it with this set. I thought about purchasing a chocolate colored coverlet (say that 3 times fast!!), but I think that would have made the bed too dark. I like to lighten things up for the warm weather months. Perhaps I'll purchase a chocolate coverlet to use for the fall season.
The one item that I do splurge on are my sheets. I like nice bed linens. I didn't grow up with matching sheets and pillow cases. When I got old enough to purchase my own bed linens, I always bought sets. As my income grew, so did my budget for linens. I also try to purchase nice comforters. I've tried buying less expensive ones, but they don't seem to have the nice filler that the more expensive ones have.
If you want to change the look of your bedding for the summer, I would suggest finding a coverlet for your bed and roll the comforter back to the foot of your bed. You may want to consider changing out accessory pillows and European shams. Or, try finding a comforter in a lighter color to lighten the mood in your boudoir!