I used Nature's Choice Organic Cotton in Dusty Blue. I think it's almost the same color as my dining room. Really, if everything were dusty blue, I wouldn't complain. The label on this yarn claims that it's a worsted weight, but it was pretty much right on gauge (I made sure to knit loosely).
Did I mention this only took about a week?
I'm still toying with the idea of adding single crochet around the neckline to firm it up a bit, but in the meantime, I'm just enjoying it.