Cast on 124 sts using a 4mm circular needle and Yarns A and C in the following way:
*Using Yarn A, cast on 2 sts, using Yarn C, cast on 2 sts; repeat from * until all stitches have been cast on. Join to work in the round, taking care not to twist sts. PM to mark beg of round.
Round 1 *K2A, K2C; rep from * to end.
Round 2 *K2A, P2C; rep from * to end.
Rep the last 2 rounds, 5 times more.
Next round Using Yarn A, knit.
Round 1 Using Yarn B, knit. Round 2 *K1B, K1A; rep from * to end. Round 3 Using Yarn B, knit. Round 4 Using Yarn A, knit. Round 5 *K1A, K1B; rep from * to end.
Knit a two-colour rib for this Scandi-style hat. Yarn C is used to create two-stitch columns of garter stitch, with Yarn A creating stocking stitch columns
Decrease the top of the hat until you have 19 sts left. Break off your yarn and thread it through these remaining stitches, pulling tightly to close up the hat