m_F322W2 versus m_F150W2 − m_F322W2 CMDs of our selected sample of stars, focusing on the upper-MS (panel a) and the entire MS (panel b), with the two fiducials used to generate the ASs. The dashed grey rectangle in panel b highlights the CMD region displayed in panel a. The blue fiducial corresponds to the bMS, while the red fiducial corresponds to the rMS. In the upper part of the MS, the bMS occupies the blue side of the CMD, while the rMS is on the red side. Below the intersection point, the two sequences switch positions. The shaded light red and dark red regions highlight areas of the CMDs affected by mild and severe saturation, respectively.