Color–mass diagram for our sample of galaxies. The (u − r) color-corrected for dust extintion vs. stellar mass. Galaxies are color-coded with the EW of Hα (the luminosity-weighted stellar age) on the left side (right side). The intrinsic color, stellar mass, and luminosity-weighted age are obtained via BaySeAGal. Dashed black lines separate blue and red galaxies following Eq. (2), where we considered the median redshift of the sample (z = 0.25). Density contours are drawn in black at the top.