The Sully blanket by Leila Raabe features simple stripes in four colors with a subtle seed-stitch detail between them. A garter stitch border is picked up to polish off the edges. Go for bold as shown, or take a tone-on-tone approach. This one's a tried-and-true smile-maker, and the designer's most highly requested "please write a pattern for this!" project over the years.
33" [84 cm] wide and 33" [84 cm] long
willet / 2 skeins dinghy 710 / 3 skeins starboard 702 / 2 skeins flare 705 / 2 skeins windlass 708
40" circular in size US 5 [3.75 mm]
21 sts and 28 rows = 4" [10 cm] in stockinette stitch, after blocking
Long-tail cast on (link provided); increasing, picking up stitches, working in the round.