Check out the wacky new yarn from Schoppel called Gradient. As you might expect, this yarn does some slow color changes over the course of the ball, a little bit like Noro, but it's much softer.
Gradient is a worsted weight, so you'll get about 4-5 stitches per inch on a US7ish. The yarn itself has a really unusual texture. It's almost like a lightly felted single ply, so the yarn is very round and springy. And the colors...
These are my two favorites, the most outlandish and the most subtle. The tonal ones are nice, too.
The Ravelers have used this yarn in some spectacular ways. There are several versions of Carina Spencer's Zuzu's Petals that are really breathtaking. This unusual item is a cowl meant to look like a lace shawl. Brilliant!
Gradient would make a great hat, too. Maybe Turn a Square or the beloved Felicity slouch? If you'd like to try fingerless gloves, maybe Nancy's Leah Gloves? One ball of this crazy cool stuff will get you a hat, a cowl, or a pair of gloves. You might have to think about where in the color repeat you want to start if you want to try gloves. Or they can be fraternal if that sort of thing doesn't bother you.
This yarn is new in the shop, but going fast!