CMDs of unresolved point-like sources in MACS0416, showing intrinsic color versus apparent F200W magnitude for four filter combinations. Each point is color-coded by the photometric recovery probability derived from artificial star tests, interpolated as a function of F200W magnitude. Importantly, the completeness values shown here reflect the joint detection probability across all four NIRCam filters (F090W, F115W, F150W, and F200W). Because inclusion in the CMD requires successful detection in all bands, the joint completeness decreases more rapidly at faint magnitudes than in any individual filter. The color bar ranges from 0 to 1.0 and illustrates this combined recovery probability. Error bars on the left side of each panel show the median photometric uncertainty in color and magnitude, computed in integer bins of F200W magnitude. These bars highlight the increase in color uncertainty toward the faint end. In the last panel, the horizontal dashed line represents the 5σ completeness limit. No K-corrections have been applied.