Comparison between the (corrected in the G case) observed magnitudes and the synthetic G magnitudes as a function of G_BP, phot − G_RP, phot for the sample in this paper (black circles) and the Stritzinger sample (red stars). The top, middle, and bottom rows show the results for G, G_BP, and G_RP, respectively. The left, center, and right columns show the results for MAW, REV, and WEI, respectively. The region shaded in gray shows the 1σ confidence range for the unrestricted fit for the sample in this paper. The region shaded in light orange shows the equivalent for the Stritzinger sample.