UBV rest-frame colour versus Sérsic index log (n) relation of late-type (lower left corner) and early-type (upper right corner) galaxies. Dots indicate redshift from z = 0.5 to 1.0 in increments of 0.1. Black solid lines connect the values of ΔB_ev from −1.5 to 1 in 0.5 magnitude increments. The arrows show the direction of the redshift and luminosity galaxy evolution. The right plot presents the UBV colour versus sSFR relation. The 0.2 dex background contour lines show the bivariate number density of all studied VIPERS galaxies in our sample (0.5 <z< 0.95). The yellow coloured regions mark the analysed redshift and luminosity limits, as presented in Figs. 1 and 7.