Variation of the IRX–M_⋆ relation for main sequence galaxies from z = 1.5 to z ≃ 6.0. The colored solid lines show the mean (obtained using IRX = ⟨L_IR⟩/⟨L_UV⟩) relation. Our predictions are compared to measurements coming from Whitaker et al. (2014) at z = 1.75 and z = 2.25. We also add average relations from Heinis et al. (2014), Pannella et al. (2015) and McLure et al. (2018) which are available from 1.5 <  z <  4.0. The redshift of each sample and the associated dispersion are indicated in the bottom right corner.