f_blue for individual clusters as a function of cluster-centric distance (r/r₂₀₀) for different bins of cluster mass log(M₂₀₀/M_⊙) (increasing right-ward) and galaxy stellar mass (increasing down-ward). Error bars mark the shortest interval including 68% of the posterior values, and are plotted as a dashed line when this interval is larger than 0.66, indicating that f_blue is very poorly constrained. Yellow shaded areas represent the posterior mean and error of the model of Eq. (2), fitting the 204 individual f_blue measurements. Radial cluster-centric bins are indicated by grey filled triangles on the x-axis and horizontal grey dashed lines limit the whole f_blue range.