The new and distinct crape myrtle plant named Lagerstroemia ‘;Dark Roast’; has a dense, short, compact, broadly-rounded habit, is ground hardy to at least USDA zone 6, has semi-glossy, mahogany-colored foliage becoming deep green at flowering time. The flowers arise from shiny, deep-red buds, are lightly fragrant, covering the shrub with their bright fuchsia-pink color. The new plant resists leaf spot and powdery mildew and is useful in the landscape as a specimen, en masse, or as a container plant.