Supreme Products Blue Rinse 30g Supreme Products Blue Rinse 30g £9.95 Quantity: at £9.95 each Add To Basket 1 in stock. This fantastic blue rinse is used to enhance the colour of white, grey, black, brown and coloured coats. This product can be used when shampooing is not possible or as a final rinse. A little goes a long way with this product so use sparingly. 1/4-1/2 a level teaspoon in a 2 gallon bucket of water should be plenty. Please do a patch test before use!