CMDs of Gran 4 using different filters and catalogues. Left panel: MUSE CMD of cluster, containing field stars in the MUSE field of view (background points) and cluster members selected by their RVs (green circles). Middle panel: optical Gaia CMD comprising 2 arcmin within the cluster centre. Field stars are shown as background grey points, PM-cleaned members are shown as black points, RV and PM-selected cluster stars are given as green circles, while RV-only members (i.e. faint to have PM measurements) are shown as purple squares. Right panel: same as middle panel with an optical-near-IR CMD. We note that, for some stars, especially at the faint-end, there are no measured BP or RP-band magnitudes, resulting in a lower number of cluster stars in the CMDs.