Mr. and Mrs. Warren Langford wanted the steps and sidewalks leading to their palatial dream home in Frontenac, Missouri, to be as dramatic as the home itself. But they also wanted to use a material that was economical. So, as a low-cost alternative to stone, they chose concrete, imprinted to simulate rough-cut limestone, for the home's 950 square feet of sidewalks and patios and 175 lineal feet of steps. To achieve the limestone coloring, a custom-blended color hardener was applied thickly to the concrete surfaces to lighten them. Photos show the striking results.