As Jerry mentioned, I started a pair of socks for my mom at XY Knitting last week. She'd asked for socks with contrasting toes and heels. So I bought some Plymouth Encore to make purple socks with yellow toes.
The socks were proceeding nicely, but they just looked so boring. So I decided to copy Hugh Mannity's idea and add some accent stripes at fibonacci-inspired intervals.
I'm generally pleased. I've mostly hidden the color jogs on the accent stripes (if you expand the picture, you might be able to spot them). Those accents look a little wonky when the ribbing starts, but not bad enough to frog back.