Top: the z − H vs. H color − magnitude diagram (CMD) for XMMU J0302.2-0001. Square boxes mark secure spectroscopic cluster members. Galaxies with projected cluster-centric distances less than 30″ are shown as red circles, those with distances between 30″−60″ as green triangles. Galaxies with concordant redshift at  >60″ distances have blue squares. The dashed black line marks the magnitude limits. The apparent H band magnitude of an L^∗ galaxy at the cluster redshift is shown with a vertical blue dotted line. To help to guide the eye we overplot the color of a solar metallicity SSP model for the clusters’ redshifts with formation redshift z_f = 5 (horizontal red dashed line). Bottom: the R − z vs. z CMD of XMMU J1532.2-0836. The symbols and colors have the same meaning as in the above plot. Two of the spectroscopic members lay on the model prediction for a red sequence at this redshift, the third member has a significantly bluer color.