Infrared color‐color diagrams (﹩J-H﹩ vs. ﹩H-K﹩) for counterparts to all X‐ray sources in the RCW 38 Chandra field. The solid line indicates the main sequence, and the dashed line running parallel to the reddening vector and the dot‐dashed line is the CTTS locus (after Lada & Adams 1992 and Meyer et al. 1997). A reddening vector indicative of ﹩A_{V}=10﹩ is marked. Sources marked with circles have errors <0.2 mag. Sources marked with triangles have errors of <0.05 mag at K_s. Left: Sources that are candidate members based on their X‐ray quartiles. Right: X‐ray sources that are not candidate members.