All of the colors used must be hand mixed & the viscosity has to be just right to allow for the proper flow (too thin it get runny, too thick it won't flow) I used 72 distinct colors on falicia. The Values and tones are similar to the Munsell system. Check my web sight [link] under studio notes, I use a gray scale base and then build the color lumiousity on that base it makes the color pop-out rather than compete with each other.