When I was 13, my favorite color was yellow. I didn't wear much of it, but I decorated my room with it, and tended to choose yellow things. By the time I was 15, black starting coming to the forefront, and yellow was forgotten. I think I may be possessed by my 13 year-old self.
Exhibit A: Lion Brand Cotton-Ease in two shades of yellow
Exhibit B: Sugar and Creme Cotton in a yellow and a yellow/white mix
Exhibit C: Malabrigo wool & angora, purchased today for a cheery winter hat/mitten set