31312039strong bluePT2026-03-30 20:24:05UF31312040blue, strongNDUF31312041centroid color 178NDBT31301676blue colorsPTRT31334216cerulean bluePTRT31334224ultramarinePTRT31334230Prussian bluePTRT31334245sapphirePTRT31334248royal bluePTRT31334253copen bluePTRT31334255French ultramarinePT