My Monkey socks with the beautiful variegated bright yarn are finished. The heels were knit in a lavender color, which I think helps pull out the brights. Truth be told, any of the colors that I was looking at would have worked beautifully. When I was knitting the foot, I was actually loving the underside with the just plain knitting (at one point I contemplated ripping both socks out and starting over!). That inspired me to knit the toes in the same yarn, and not use a contrasting color.
All from this gorgeous yarn: