Median (U − B)_rest color (upper panel) and relative percentage (lower panel) as a function of stellar mass of galaxies with blue colors, i.e., , for the different selection criteria (in violet the morphological ETGs, in light red the red-sequence galaxies, in dark red the red UVJ galaxies, in pink the red SED galaxies, in orange the quiescent galaxies, and in yellow the red & passive ETGs). The errorbars represent the error on the median.