Blue, love the imagery.
Alas, mine's the other way around. There is a 15 degree difference with the downstairs being cold. You can literally feel like you are stepping down into a cooler when you walk down the stairs. It's just an issue with the design but as I spend 90% of my time upstairs it's no big deal.
For what it's worth, a big old sleeping bag was my comforter on my futon (which was then my bed) for about 6 years and still looks new. Slept with the window open at 30 or lower when I lived in Seattle, closed the door so the rest of the place didn't freeze and snoozed.