CO64
ktbl, p1 ribbing for 1 inch
Stockinette for about 4 inches.
Stockinette until the rainbow is starting.
Heel flap is Eye of partridge.
Rainbow stripe during Gusset decreases - change to 1.75mm needle to get all the way around with stripes.

Toe decreases after 2 or 3 rounds of red at approx. toe decrease location.