Color–color diagram for a realization with M_s = 4 and ﹩{\tau }_{g}^{{\rm{h}}}=1.2﹩, using the ISRF of S. Bianchi (2024). The top and bottom rows show the color–color diagrams for the unmodified ISRF of S. Bianchi (2024) and for the case where the g-band intensity is scaled down by a factor of 0.9, respectively. Star symbols indicate the initial ISRF colors. All other lines, symbols, and numerical values are the same as those in Figure 6.