Dilution factors ξ_S as a function of color temperature T_S for filter combinations S={B,V}, {B,V,I}, {V,I} and {J,H,K}. We use a common y-axis scale for all bandpass combinations S to highlight the differences in the scaling behavior of the dilution factors. For comparison purposes, we include the models of D05 as blue crosses. Polynomial fits to the dilution factors are shown for all sets of models (dashed: TARDIS, dashed dotted: E96, dotted: D05). For {J,H,K} the D05 curve is not included due to a misprint in the tabulated fit coefficients in the original paper.