Quikrete Cement Color Gray Brown is a liquid additive for adding color to concrete, mortar, sand mix, stucco and other cement mixes. Quikrete Cement Color is added to the water before mixing into the dry Quikrete cement mix. Use Quikrete Cement Color with Quikrete cement mixes to add color to a variety of projects, including - curbs, driveways, fishponds, floors, patios, sidewalks, steps and stucco.