More "commissioned" knitting

Or what ever you call it when your son says "Mom, can you please knit me a hat?". Wants it to be charcoal black with a single dusty green stripe. I think Dave has leftover green from the Aran sweater he finished at Chrismas. I asked what style and Graham described about 3 different ones. I told him to draw them up on his CAD software and I'd see what patterns I have to match.