I have tried adding flo. colors after cooking and I have much better results adding before. I use mostly del and bear colors but my flor. colors are from lurecraft. There are some recipes out there but they only get you in the ball park. There are alot of factors such as size of hole in your color bottles, brand, how well you mix it. its best to keep track of what your doing as you go. some colors it only takes a few drops and others it takes a good bit of coloring.