Bolometric corrections relative to the g band as a function of (g − r) colour (top panel) and (g − i) colour (middle panel), and relative to the V band as a function of (B − V) colour (bottom panel). SN 2023ixf is presented as blue dots, while pink dots represent the cooling phase of the SNe II in the CSP-I sample (see Martinez et al. 2022a). The dashed lines shows the fit to the data. The errors in the CSP-I SN II data are not plotted for better visualisation.