The Common (✦) and Uncommon (✦✦) color palettes must strictly have only 3 different colors. Having more than 3 colors in the palette is considered as Rare (✦✦✦). Uncommon fur (✦✦) is only for natural colors shades! It can be mixed with the Rare fur colors (✦✦✦), if you want to do a same shade of non-natural colors. Natural colors are the colors you can find on a rabbit. Non-natural colors are all the others colors.