Gaia DR3 CMD for the identified white dwarfs (blue symbols) and their CPM companions (red symbols). The adopted cut on the white dwarf locus is indicated by the dotted line. The solid orange lines connect white dwarfs to their corresponding CPM companions. Note that one of the pairs is a double white dwarf system (red symbol below the dotted line). For comparison, the CMD for the 50 pc Gaia DR3 sample is shown in the background (grey symbols). The square symbol indicates GJ 629, which is itself a spectroscopic binary (see Sect. 3.2 for details).