In the Weeds is a charted pattern with 9 colors. The corrugated ribbing is done on size 2 needles then you switch to size 3 needles for the rest of the hat.

Knit Picks Palette (fingering weight 100% wool yarn):

Ash 30 yds
Bark 36 yds
Clover 30 yds
Caper 25 yds
Lichen 5 yds
Mist 25 yds
Cream 15 yds
Green Tea Heather 20 yds
Spearmint 20 yds