Mixing grays and/or shadow colors. The 3 new colors I got yesterday are mixed top left Brown Madder by Schmincke and Verditer Blue and Mineral Violet by Holbein... also on this page is Schmincke Yellow Ochre and Holbein Marine Blue and Permanent Rose... I particularly like the p.Rose blend. They all turned out nice and I expect I'll use them all from time to time.