Dependence of f_blue on M and z at fixed r/r₂₀₀ (panels a and b), on z and r/r₂₀₀ at fixed M (panel c), and on M and r/r₂₀₀ at fixed z (panel d). Data points with error bars are the same as in Fig. 11. Shaded areas represent the posterior mean and 68% confidence interval of the modeling of Eq. (3), fitting the 225 individual f_blue measurements. Prediction/extrapolation of this model for bins where we do not have data are plotted as hatched areas and dashed lines. X-axis bins are indicated by gray filled triangles on the x-axis and horizontal gray dashed lines indicate the minimum and maximum allowed values for f_blue.