One of the most versatile of the Bob Ross colours is Alizarin Crimson. It is frequently used in dark mountain mixtures for underpainting. Perhaps most notable, however, are the stunning purple and lavender shades created with this colour. One of fourteen warm clean colors, yielding endless numbers of natural combinations in a smooth yet firm consistency necessary to the Bob Ross Wet-on-Wet Techniques. No other paints can accomplish what these do, and every batch is individually tested for perfection.