Its normal. In fact its D.O.T. mandated that all vehicles have to have running lights (usually amber) in the front but can never have amber running lights in the back.
BTW, amber is the color that our eyes/minds notice best, thats why its used for signals.
you know its funny,cause the lights are the sedcond thing I change once I get the fender cut. This is the firsttime I actaully still have the stock signals on. So i couldn't remember if this was normal