Left panel: F814W versus F606W − F814W color-magnitude diagram of KK 203 from the ACS HST imaging showing all sources identified as bona fide stars by the DOLPHOT PSF fitting routine. Overplotted are three BASTI isochrones for a 14 Gyr old population and metallicities as indicated in the legend. Right panel: statistically cleaned CMD, this time with F606W on y-axis to emphasize the presence of young blue stars with ages ranging between 30−300 Myr (blue box). The areas of the CMD where the old RGB stars (red) and intermediate-age thermally pulsing asymptotic giant branch (TP-AGB) stars (green) are located are also indicated. A set of BASTI solar-scaled isochrones with the range of ages indicated in the legend does not include the TP-AGB phase.