Spring Forward socks, by Linda Welch, from Knitty. In Auracania Ranco Multi.
Squiggly socks! Spring Forward, by Linda Welch.
I love this colorway. It's Auracania Ranco Multi colorway 306, and some people call it the "Rainbow" colorway, but it doesn't feel rainbow-y to me at all, just lots of muted colors all together.