Colour Mill is described as next generation oil based concentrated colouring. The formula is completely oil based which allows the colouring to disperse properly to create deep, dark and vibrant colours. These colours are designed to work best with buttercream, ganache, swiss meringue, cake mixes, chocolate, and sugarpaste. Choose from the amazing 29 shades which can be mixed together to achieve various shades. Colour Mill colours only require a tiny drop.