A while back I knit a Craftsy kit called the tool box cowl. Mine was the hill myna colorway, a gradient of grays with a mustard yellow to cheer things up. (I love gray and yellow. Love, love, love. Pretty much the color scheme of my entire house.) I added in some cream as well to get a wider cowl and to create more contrast.
There was yarn left over, so I just knit up a tool box hat to match.
They are both really simple patterns, with a slip stitch garter transition between colors. I was never knitting with more than one color per row thanks to the slipped stitches.
No decreases needed, and a quick three needle bond off. Then the corners turned in, a braid, and a matching set is done.