My recipe testing is not yet complete, so I can only offer a few colors at the moment. More will be added as they are calculated and tested. All recipes are for 10 debens of that color, of course.
Recipes
Carrot: 10 Carrot (non-reactive)
Chocolate: 1 Red Sand, 9 Carrot
Goldenrod: 1 Clay, 1 Sulfur, 9 Carrot
Medium Orchid: 1 Iron, 9 Cabbage
Saddle Brown: 10 Clay (non-reactive)