Observed g − r colors at around g band peak versus rest frame g band peak absolute magnitude of our SLSN II (green) and the sample of SLSN I (gray) presented by Chen et al. (2023). In green we include a straight line fit to the scatter plot, the slope (s) is indicated in the label of the figure. We also annotate the distribution’s Pearson’s r parameter and associated p value. Horizontal dashed gray lines show the interval between the bluest color of the SLSN II and color = 0.0 mag. A vertical dashed gray line indicates peak absolute magnitude = −22 mag.