How to Crochet a Cozy Hat with Colorful Designs

You’ll Need
70g of main color A Red Heart Miami yarn;
Odds of the same yarn, but in color B;
Crochet hook 3 mm;
Yarn needle.
Size
Hat circumference: 48-50 cm
Hat height with brim: 20 cm, 14 cm until the brim, brim height: 6 cm
Instructions
Round 1: Begin with a magic ring using the main color.
Ch1, 12 hdc in the ring. Join with sl st to top of first hdc. (12 stitches total)Round 2: Ch1, 2 hdc in same stitch and 2 hdc in each st around, sl st to top of the first hdc. (24 stitches total)
Round 3: Ch1, 1 hdc in same stitch, *2 hdc in next hdc, 1 hdc in next hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st to top of first hdc. (36 stitches total)
Round 4: Ch1, 1 hdc in same stitch, 1 hdc in next st, *2 hdc in next hdc, 1 hdc in each of the next 2 hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st in the top of first hdc. (48 stitches total)
Round 5: Ch1, 1 hdc in same stitch, 1 hdc in each of the next 2 hdc, *2 hdc in next hdc, 1 hdc in each of the next 3 hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st to top of first hdc. (60 stitches total)
Round 6: Ch1, 1 hdc in same stitch, 1 hdc in each of the next 3 hdc, *2 hdc in next hdc, 1 hdc in each of the next 4 hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st to top of first hdc. (72 stitches total)
Round 7: Ch1, 1 hdc in same stitch, 1 hdc in each of the next 4 hdc, *2 hdc in next hdc, 1 hdc in each of the next 5 hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st to top of first hdc. (84 stitches total)
Round 8: Ch1, 1 hdc in same stitch, 1 hdc in each of the next 5 hdc, *2 hdc in next hdc, 1 hdc in each of the next 6 hdc*, repeat around from * to *, ending with 2 hdc in last st, sl st to top of first hdc. (96 stitches total)
Round 9: Ch 1 tight, 1 hdc in same stitch, 1 hdc in each stitch around, sl st tight to first hdc. (96 stitches total).
Rounds 10-23 will be worked the same way as round 9, changing colors for the band as below.
Band
For the white hat, I made 3 rounds in contrast color (rounds 20, 21, 22); for the hot pink hat, I made only 2 rounds (rounds 20, 21). Your choice if you want to make the band wider or narrower.
To make the band, at the end of round 19, sl st tight with the color B yarn and continue working with color B for rounds 20, 21, and 22 the same way as round 9; at the end of round 22, sl st tight with color A yarn and continue working the round 23 with color A yarn the same as round 9. Cut color B yarn.
Brim
The brim is worked with sc in back loops only. To avoid gaps, try to work the stitches not loosely; at the end of the rounds, work your last stitch picking together the back loop of the stitch and from the back side of your work a loop from the previous round. Otherwise, you will have gaps. You'll have 3 rounds with increases, each increase to 16 stitches.
Round 24: Continue with color A yarn, ch1, 1 sc blo in each hdc across the round, sl st to top of first sc (in both loops). (96 stitches)
Round 25: ch1, *2 sc blo in the same stitch, 1 sc blo in each of the next 5 stitches*, repeat around from * to *, sl st to top of first sc. (112 stitches)
Rounds 26 and 27: ch1, 1 sc blo in the same stitch and 1 sc blo in each stitch across, sl st to top of the first sc. (112 stitches)
Round 28: ch1, 1 sc blo in the same stitch, 1 sc blo in each of the next 3 stitches, 2 sc blo in next stitch, *1 sc blo in each of the next 6 stitches, 2 sc blo in next stitch*, repeat around from * to *, ending with 1 sc blo in each of the last 2 stitches; join with sl st to top of first sc. (128 stitches)
Rounds 29 and 30: ch1, 1 sc blo in same stitch and 1 sc blo in each stitch across, join with sl st to top of first sc. (128 stitches)
Round 31: ch1, *2 sc blo in same stitch, 1 sc blo in each of the next 7 stitches*, repeat around from * to *, join with sl st to top of first sc (144 stitches)
Rounds 32-34: ch1, 1 sc blo in same stitch and 1 sc blo in each stitch across, join with sl st to top of first sc. (144 stitches). Cut yarn. Note: For the white hat, I made one round less!
Brim Edging
Join color B yarn with a sl st and make 1 tw sc in same stitch, ch2, skip 2 stitches, *1 tw sc in next stitch, ch2, skip 2 stitches*, repeat around from * to *, sl st through the seam of the first tw sc (on the back side of your work) as in the collage below. Cut yarn. Weave in the ends.