I stumbled upon the lovely prye.com site while looking for color combination information. She’s selling wedding stationery, but these color combinations would be gorgeous in knitting or crochet work: think sweaters with contrasting hem and cuffs, two-color-hats, or anything else stripey.
In a related note, I saw a 4-color beanie hat while traveling recently. Each section was about 2″ long, in a different color and stitch pattern: Bottom – ribs, black and white tweed; next section: olive green – garter stitch, next section: burgundy – basket weave; top: burnt orange, stockinette with the decreases. It was definitely well-loved.