This is because all water-based materials have been removed and replaced with bake & cake friendly oils; these oils mix through much better than water-based gels (which we know water repels from the oils in your baking).
Edible Food Colouring Mill Navy Oil Based 20ml Cake Decorating Sugarcraft
Colour Mill Oil Blend Food Colouring Navy: Next Generation Oil Based Food Colours - 100 ml
Colour Mill Oil Blend Food Colouring Navy: Next Generation Oil Based Food Colours - 20 ml
Colour Flex Navy Blue Oil-Based Food Colouring 25ml - Vibrant Concentrated Formula for Chocolate, Buttercream, Cake Batter and More by Sugarflair - Vegan, Kosher, Bake-Stable
SuperiOil Oil Based Food Colouring 30ml - Navy Blue
Oil Based Food Colouring for Chocolate - Vibrant Fat Soluble Food Colouring for Candy Melts, Baking, Cake Decorating - Upgraded Edible Food Colour Dye for Icing, Fondant, DIY Crafts - 60ml (Navy)