850036 Rainbow Dust Liquid Colour - Turquoise - Retail Pack COLOUR-RD-LIQUID-TURQUOISE-RP-19g £1.57 Quantity: at £1.57 each Add To Basket Rainbow Dust's Liquid Colour is a range of highly concentrated liquid food colours available in various shades. They are ideal for mixing into royal icing, buttercream and are ready-to-use with your air brush for those all important cake creations. 19g pot. Retail packed. (Boxed 1).