Color–magnitude diagrams in the I_E and H_E bands for RSG PISNe (top), WR PISNe (middle), and SLSNe (bottom). PISNe and SLSNe at z >  0.5 at all phases are plotted with a redshift interval of 0.1. The color evolution with time can be found in Fig. 13. The regions covered by SNe Ia and SNe II at z >  0.5 are shown. No extinction is assumed. The survey limiting magnitudes for the I_E and H_E bands (25.5 mag and 24.0 mag in AB magnitudes, respectively) are indicated by the dashed lines. Most SNe Ia and SNe II at z >  0.5 are too faint to be detected in the H_E band with the 24.0 mag limit.