We review Period-Color Relations at maximum/minimum light for RRab stars and suggest why RRab stars seem to have a flat Period-Color Relation at minimum light. We also show how the Oosterhoff dichotomy between Galactic OoI and OoII clusters expressed in terms of the Period-Amplitude Relation can also be demonstrated in terms of Period-Color Relations at maximum/minimum light. We briefly discuss a new Galactic RR Lyrae survey in progress to study PC relations at maximum/minimum light.