Color-color diagram of all our (potential) members for metallicity estimation following PL18 (filled circles: highly likely members; open circles: candidates). The members of Pace & Li (2018; p >  0.5) are indicated by crosses. The member of Pace & Li (2018) that is not confirmed by spectroscopy is indicated with a plus. Foreground stars are selected by requiring that they do not pass our halo selection based on Gaia kinematics. Larger symbols are stars brighter than m_i = 20. The Parsec isochrones we used here only have evolutionary stages brighter than the turnoff.