Colored concrete masonry is getting even more colorful. Now in Canada and some parts of the United States, architects can select multicolored concrete masonry units. Each unit is intentionally made of two or more colors of concrete. In a wall, they produce pleasing, dappled surfaces. How does the producer make multicolored units? There are several methods. Probably the most common one is to divide the mixer hopper into two compartments for two different colors of concrete. The two colors then blend as they flow from the hopper into the block machine. A second method is to make small batches of concrete, alternating the color with each batch. The hopper is filled in thin layers, first a batch of one color, then a batch of the other color. Regardless of what technique is used, the key to an appealing colored concrete masonry wall is still consistency.