ICL mass fraction within R₂₀₀ of the cluster as a function of the three different theoretical parameters introduced by Neto et al. (2007) to quantify the dynamical state (from left to right subhalo mass fraction f_s, centre of mass offset Δ_r and virial ratio η), together with the formation time, z_form. The first three panels are coloured by z_form, while the fourth one is coloured by f_s, as indicated in the colourbars. In all panels, the Spearman correlation coefficient, r_S, is indicated in a lower corner. The vertical dashed lines indicate the thresholds used in Cui et al. (2018) to distinguish between “relaxed” and “unrelaxed” clusters: 0.1, 0.04 and 0.15, respectively. Clusters to the left of these lines (value lower than the threshold) are relaxed, and those to the right are unrelaxed.