Extinction-corrected Gaia CMD of NGC 6231. The high- and low-probability members are indicated with dark green and orange, as identified in Fig. 2. The stars plotted represent 90% and 91% of the high- and low-probability members, since extinction values are not available for the rest. The ZAMS locus is indicated with the solid black curve. Evolutionary tracks and PMS isochrones are overplotted in gray and black for the stellar masses and ages indicated.