An illumination system for a vehicle running board comprises at least one lighting module in connection with a step portion of the running board. The lighting module extends longitudinally along the running board proximate to at least one door of the vehicle. The lighting module comprises a first light source disposed in a first end portion of the lighting module and a second light source disposed in a second end portion of the lighting module. A waveguide forms an emission surface extending longitudinally along a side portion of the step portion. A controller is configured to activate the first light source illuminating the side portion in a first color and activate the second light source to illuminate the side portion in a second color.