Gaussian process interpolations of the colours (g − r in orange and B − V in blue) of SN 2022lxg compared to those of other luminous Type II SNe from the P23 sample. We overplot the actual measured g − r colours of SN 2022lxg with faint squares and the 1σ uncertainties of the interpolations as shaded lines. Mean values of B − V colours of the sample of SNe II studied by de Jaeger et al. (2018) are presented in grey for comparison (with the 1σ standard deviation plotted as a shaded region).