How many shades of blue are there? There's the soft blue of a baby's cherished blanket, the ocean blue of a romp in the waves, the chilly blue of a cold winter's walk in the snow, and the true blue of the bond that exists between children and animals. In this simple, sumptuously illustrated companion to Caldecott Honor Book Green, award-winning artist Laura Vaccaro Seeger turns her attention to the ways in which colour evokes emotion, and in doing so tells the story of one special and enduring friendship.