Mix the powder with the liquid release and then dip a clean rag sponge or brush. Advantage of integral color is that, it mix trough out the concrete, so the stamped concrete patio. Stamped Concrete Patio Large Ashlar Slate Stamped Concrete Patio Concrete Patio Stamped Concrete Patio Designs Since 1990, decorative concrete has been the building block and foundation for graley concrete. Ashlar stamped concrete colors . Take a look at some of our completed projects. For a classic and elegant look go with a brick pattern. It comes in field colors of cappuccino (ch), buckskin (ch) with chocolate (ra) and with border colors of buckskin (ch). For reference, we selected light grey with the ashlar slate stamp for our patio. Stamped concrete colors and patterns. This large 36” x 36” ashlar cut stamped concrete design gives your patio a much larger look, a perfect accent to a fire pit. If you are looking to purchase a full set, please go back and select “ashlar cut slate” fo...