2MASS J-band absolute magnitude vs. I – J color diagram for 23 candidates with available Gaia parallaxes. The DENIS I-band and 2MASS J-band photometric data are listed in Table 1. Isochrones and mass tracks from the BT-Settl CIFIST 2011–2015 models (Baraffe et al. 2015) are plotted. The hatched blue area indicates the region in which lithium is not completely depleted and can be detected in the stellar atmosphere.