What type of mixture is the food coloring?

Answer 1

You must read the package as food coloring comes in different strengths depending on the brand.

Though this answer is true it is not very helpful. a little more direction for Cake icing, for example, takes 3 drops of blue and 2 drops of green to create teal, a 3:2 ratio. Egg coloring takes 15 drops of blue and 5 drops of green, a 3:1 ratio (Reference 1). For teal, the general idea is to add more blue and less green. For orange, add more yellow and less red. For purple, use slightly more red than blue. Add a little bit of yellow to green to get a jungle green. Combine all the colors for dark brown or black.