The AKC recognizes 3 coat colors in Labradors: black, yellow, and chocolate. Sometimes there is a small white marking on the chest. It is controlled by two groups of genes, one group controls black and yellow, and the other group controls the nose color in black and pink. In terms of popularity, black Labrador Retrievers are the most popular, followed closely by chocolate Labradors and then yellow. The Labrador coat is short and glossy, and slightly oily, allowing them to dry fast after swimming. Labradors also have webbing between their toes, which contributes to their ability to be powerful swimmers. Labradors are stocky, with big heads and short hair. Their earflaps hang down, and they have a long, powerful tail, which also aids them in the water.