Comparison of the dust-free TNG100 colors (blue contours) to the results from Akins et al. (2022) for the SIMBA simulation (green contours). For both simulations, the colors are obtained with FSPS-MILES such that all differences in the UVJ distributions reflect variations in the underlying stellar populations. For massive galaxies, the SIMBA galaxies exhibit bluer U − V colors which is due to their higher star-formation rates (Fig. 10).