Chrysler PGR/XGR, Shale Green Pearlcoat. Paint Code PGR/XGR, Shale Green Pearlcoat for Chrysler. PGR/XGR, Shale Green Pearlcoat for Chrysler is formulated using R&E Low VOC Urethane Basecoat paint. The R&E Low VOC Urethane Basecoat paint exhibits exceptional color accuracy and excellent coverage and is specifically designed for all Automotive Refinish Applications.