Fimo Pro (formerly called Fimo Classic) has a larger color range than what I've shown. I've found that the colors in the photo above, plus black and white, should be all that are needed to mix any color. The purple is a bit dark and shows its color better if mixed with a little white. There are even more colors…
FIMO Effect oven-bake polymer clay, yellow (translucent), Nr. 104
Staedtler FIMO Effects Polymer Clay -Oven Bake Clay
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A True Color Fimo Professional Polymer Clay - Yellow
RICH COLOR CHOICES: ARTME polymer clay set has 82 vibrant colors, that retain their vibrancy after baking. Each clay is 0.7 oz, 82 colors enough for
Artme Polymer Clay, 82 Colors Clay Kit, Oven Bake Modeling Clay, Creative Polymer Clay Kit with Sculpting Tools and Jewelry Accessories, Non-Toxic
Mix FIMO colours – discover Colour Worlds
A Fimo Professional Polymer Clay True Colors Description - Poly
Simple Colour Mix Tutorial using Fimo Polymer Clay
Fimo Professional Colors When Baked – Polymer Clay Journey
A Fimo Professional Polymer Clay True Colors Description - Poly
Mix FIMO professional colours yourself - The FIMO professional