Rest frame u^∗ − r′ versus absolute r′ magnitude relation for clusters using spectroscopic redshifts to compute absolute magnitudes. We only plot cluster members in these figures. From top to bottom, figures are for the most luminous, the luminous, the moderately luminous, and the C0 clusters. Red symbols correspond to early-type galaxies (T ≤ 21), blue symbols correspond to late-type non-starburst galaxies (58 ≥ T ≥ 21), and pink symbols correspond to starburst galaxies (T ≥ 59). Black continuous lines are computed using only T ≤ 21 galaxies (see Table 6).