Zero-age main sequence in the Hertzsprung–Russell diagram for (non-rotating) evolutionary models with Z = 0.02 Z_⊙ (blue, Szécsi et al. 2015), and for the SMC (green), LMC (red), and Galaxy (black) from Brott et al. (2011); the LMC results are supplemented by higher-mass models (dotted red line) from Köhler et al. (2015). Results for five initial masses (in units of M_⊙) are highlighted by the blue dots to illustrate the temperature dependence vs. metallicity (but with no 10 M_⊙ model available for the SMC).