Colour–magnitude diagram for the galaxies in this study, showing u^′ − r^′ rest-frame colours versus r-band absolute magnitudes. Red filled circles represents massive spheroid-like galaxies, while blue open stars represents massive discs. Their satellites are represented with filled and opened squares of the same colours. The dashed magenta line corresponds to the separation for the red sequence and the blue cloud in our sample, obtained from a double Gaussian fit to the histograms of the Rainbow data in each redshift range, presented on the right.