Same as Fig. 3, but selecting sources within R<R200, and subtracting the background statistically in each cluster field. Results are plotted as function of absolute r-band magnitude, and the (g − r)-colour is shifted to a common redshift of z = 0.05. Statistical weights (after background subtraction) are indicated in grey scale. The red solid line is the division used in vdB15 to separate red-sequence from bluer galaxies (now independent of redshift due to the shift). The dashed line is the same but off-set by 0.08 to approximately fit the red sequence. Error bars show median 1σ uncertainties on the colour measurements, in bins of magnitude.
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