Insoluble food colours are used to colour oil-based products, such as chocolate, buttercream, and candy and pastry coatings. It is perfect to limit colour bleeding when several colours are side by side.
Advantages

Ideal for fatty substances, such as chocolate
Less aggressive colouring than the water-soluble variety
Colouring through dispersion to limit bleeding
100% Edible- Gluten free- Lactose free-Nut free- Vegan- Vegetarian.