Maybe I missed something, but if you're sleeping in a tent, why is the color of the sleeping bag within the tent an issue?

I'm +1 on Western Mountainneering, but they're not cheap. I did buy a dry sack/dry bag (depending on who you're talking to; they're pretty much synonymous) to keep it dry. You can get some pretty light weight dry bags.

The bag I got is the Summerlite which is rated at +32F. I paid $245.00 for it, but it's only one pound, three ounces, and highly compressible. If you're looking for a bag that's rated at around +35/40 and you sleep cold, this bag would be about right for you. I tend to sleep a liitle cold too, but I have had no problems on nights in the 30's with my Summerlite. http://www.westernmountaineering.com/ind...mp;ContentId=69

The dry sack I got weighs just 0.9 ounces (i.e. less than one ounce): http://www.rei.com/product/730876