Crossing of the bMS and rMS stars in the JWST photometry-based CMD. (a) In the HST m_F814W versus m_F606W − m_F814W CMD, we isolated a sample of bMS (black points within blue circles) and rMS (black points within red circles) stars; the two sequences are clearly distinguishable. (b) The same samples highlighted in the JWST m_F150W2 versus m_F150W2 − m_F322W2 CMD, using the same colour code. The shaded light red and dark red regions highlight areas of the CMDs affected by mild and severe saturation, respectively.