The worlds full of color, why limit yourself to just a few...
I am looking a modding a SOL Escape Bivvy, uh huh, light and small.
Consider Zpacks bag. Weights 11oz; rated to 40 degrees. I just bought one and had them make mine without a zipper so it's just like a top quilt. There's nothing lighter for the rating....nothing! Only downside is cost but its worth it to me as I move into ultra light backpacking.
Yea, that would be a great bag from zpacks but they have about a grand of my cash as they build my arc blast pack and accessories and my tarp so another $300 plus is not what i am about at the moment. Maybe my mind will change but the Escape bivy has so many possibilities, size and weight wise.