For those lovely Lingonberry Mittens, inspired by Baltic and Sweedish knitting traditions, you only need one skein of main color and then just use up your leftover yarn for the pattern. The choice for the cuff is free, and for the hand-part - as long as the stems are greenish and berries are reddish - you have the right expression!
Light fingering yarn is ideal, if you use thicker qualities, you get a larger mitt.