Candidate distribution in two representative color–color spaces for the primary AllWISE-based sample, grouped by validation category. The upper panel shows i_AB − z_AB vs. z_AB − Y_AB. The lower panel shows z_AB − Y_AB vs. Y_AB − J_vega. Blue points are candidates with non-L and -T phototypes. Red points are L and T candidates retained after the LePhare check. Green points are objects rejected as potential extragalactic contaminants by LePhare. Orange points are objects recovered by proper-motion reassessment. The black line and black circles mark the empirical M0–T9 color-template sequence from M. dal Ponte et al. (2023).