Just look at those gorgeous colors. Claudia, dyer extraordinaire, of Wollmeise really has an eye for color. This is one of my favorite colorways of hers, Blue Suzanne, in 80/20 Twin.
The pattern is Sockhead Hat. It is a very simple pattern, knit in the round using any fingering weight yarn, that makes a fun and comfortable slouchy hat. This is the same pattern I used about a year ago to make my purple and white hat.
Wicked Awesome Knitter 