A roofing shingle has a shingle body with at least a top layer having a buttlap portion with a butt edge and a headlap portion. An exposure zone extends from the butt edge toward the headlap portion and is configured to be exposed to the environment when the roofing shingle is installed on a roof. A shadow formation may be located in the exposure zone of the top layer. The shadow formation and the exposure zone differ from each other in at least one aspect, such as color. The top layer may be substantially rectangular and have no tabs formed along the butt edge. A thickness of the exposure zone and a thickness of the shadow formation may be substantially identical. The shadow formation may be a simulated cut out, slit or slot.