Color–magnitude diagrams for a sample of L and T dwarfs. The colored lines are theoretical tracks from BSH06 and BTSettl09, for different gravities and metallicities. For each metallicity, the gravity increases from left to right, assuming the values 4.5,5.0,5.5 for BSH06 tracks and 4.5, 5.0, 5.25 for BTSettl09. The 11 targets presented here are plotted as filled circles with their associated error bars, the Dwarf archive objects are plotted as triangles and the Leggett archive objects as squares. All magnitudes in the MKO system. The cross above the legend indicates the typical uncertainty on the literature objects.