Near-infrared color−magnitude diagrams of proper motion selected objects. Nineteen red solid circles stand for unresolved Pleiades candidates with two or more proper motion measurements; five unresolved candidates with only one proper motion measurement (less reliable candidates) are depicted with red open circles. Five green triangles represent resolved sources; fifteen photometric cluster nonmembers are depicted with violet crosses; and the three faint objects complying with our photometric criteria found next to the astrometric circle of the Pleiades are shown with blue solid squares. The three unresolved T-type candidates of Casewell et al. (2011) are shown with brown diamonds. Previously known proper motion Pleiades members that were confirmed spectroscopically are plotted as solid black dots (from the catalog by Bihain et al. 2010). In the right panel, UKIDSS K_s nondetections are plotted as (color−coded) left arrows, indicating J − K_s upper limits. Masses in Jupiter units are provided at the right side of the panels (based on the 120 Myr isochrone by Chabrier et al. 2000a).