g − r observer-frame color corrected for Galactic extinction vs. photometric redshift. Red crosses represent lenses found by KiDS, with error bars indicating the range between the predicted maximum and minimum estimated redshift. Blue dots represent newly found HQ candidates. Histograms of redshift and color, for both populations, are plotted along each axis to better visualize the distribution of values. Values of the median color and estimated redshift for both populations are represented by dashed lines (TEGLIE) or solid lines (KiDS) and reported in the plot.