Stellar mass-halo mass relation for the Magneticum Box2 hr clusters. The gray points show the total stellar mass within R_200c, including the BCG, ICL and satellites. The colored symbols show the stellar mass of only the ICL and the BCG together, without including satellite galaxies. These points are colored according to the formation redshift of the cluster from older and more relaxed galaxy clusters (red) to younger, recently assembled clusters (blue).