Color-magnitude diagram for the fitted galaxies in MACS 1206. The gray dots represent all detected sources in the WFC3/IR field of view, overlaid by the fitted galaxies, color-coded according to their Sérsic index n in I₈₁₄. Fitted galaxies (colored diamonds) with black crosses denote sources that are not considered in the subsequent analysis due to an n < 2.5 or morphological features, such as spiral arms or distortions. As expected, our final sample galaxies all lie on the red sequence.