The UVJ plane of the TNG50, EAGLE, and TNG100 cosmological hydrodynamical simulations. Each panel contains only galaxies at z = 0 within the same stellar mass range (10⁹⁸ M_⊙ < M_⋆ < 10¹² M_⊙). All colours are calculated from SKIRT-generated fluxes or images that take dust attenuation into account. The colour scale represents the median sSFR of all galaxies with UVJ colours within each pixel. The dotted line in each panel indicates the separation between the quiescent and star-forming galaxy populations and is taken from Donnari et al. (2019).