HR diagram (same as Fig. 4) overplotted with theoretical isochrones for ages of (from left to right) 50 Myr, 100 Myr, 500 Myr, 1 Gyr, 5 Gyr, and 10 Gyr with Z = 0.3 Z_⊙ (blue lines), Z = Z_⊙ (black dotted lines), and Z = 3 Z_⊙ (magenta lines), using the PARSEC isochrones (Bressan et al. 2012). The PARSEC isochrones do not include the tip of the AGB, but it can be used to compare isochrones for different metallicities.