f_blue for individual clusters as a function of cluster-centric distance (r/r₂₀₀) for different bins of redshift (increasing rightward) and galaxy mass (increasing downward). The computed value of f_blue already takes into account the mean aging of stars with increasing redshift by defining the color compared to an exponentially declining SFH model with τ = 3.7 Gyr. Error bars represent the shortest interval including 68% of the possible posterior values for f_blue, and are plotted as a dashed line when this interval is larger than 0.66, indicating that f_blue is not constrained at all. Radial cluster-centric 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.