The hat in the photos was knit with gray worsted weight yarn and (sometimes I experiment!) a DK weight pink. The DK is lighter, but it carries along well as the second color.
Our DK weight Edition 3 would carry along well, too. Since the pattern calls for both yarns being worsted weight, there is a little take up in the knitting, but I found it was not enough to matter.
So try Brown Sheep Nature Spun worsted for the main color.
Pair it with Schoppel Wolle's Edition 3.
Edition 3 colors shown are Mineral Resources (2471) on the left. On the right: Neighbor's Garden (2474) Look how saturated these colors are next to the that raspberry shade (Boysenberry) and black (Pepper) in the Nature Spun worsted yarn. Luscious!