Concrete is tough stuff: When it comes to walks, patios, and driveways, few materials are as durable. And when a custom finish is applied to this rugged material, the results can be impressive. In this article, I'll explain the techniques that can be used to change a dull, gray slab into an architectural asset. COLORFUL CONCRETE An impressive way to enhance the look of concrete is to add color. Attractive applications are limited only by imagination and taste. We've even poured colored slabs that served as the finished interior floor. There are a number of ways to add color to concrete, and each method has both merits and drawbacks. Delivered in Color Whenever possible,