NUV vs. NIR color-color diagram for the 842 RGs with GALEX NUV magnitudes. From this, the NUV excess was calculated by subtracting the measured (NUV-J)₀ magnitudes and the expected values given the fiducial relation from Findeisen & Hillenbrand (2010) and the measured (J − K)₀ colors. The targets are color-coded by their NUV excess values, with redder colors indicating stronger excess (more negative values). The gray symbol represents the median error bars.