The yarn for this pattern is a Spectrum Gradient kit consisting of 10 colors, 25 grams each. A variety of Spectrum Gradients are forthcoming in early 2014, and the pattern specifically calls for the Arco Iris Spectrum Gradient, seen here.

From the pattern:

Description: With simple bias-knit lines and a slipped-stitch rolled edging, this convertible scarf will satisfy your need to keep warm as well as emblazon your world with up-beat color. Use the buttons and make a cowl long enough to wrap twice! Beads add that little bit of extra twinkle just right for a winter night out.