Hertzsprung-Russell diagram of the full BLOeM sample. Stars are colour-coded by spectral type, as indicated in the legend, and T_eff and log(L) values are from Bestenlehner et al. (in prep.). The black curves show evolutionary tracks for different initial masses at SMC metallicity from Schootemeijer et al. (2019) with an overshooting prescription from Hastings et al. (2021). Lines of constant radius are marked in grey, and isochrones of different ages are shown with dashed brown curves. The black cross on the left illustrates typical uncertainties in T_eff and log(L).