Subsamples of galaxies in colour, absolute magnitude and redshift bins. Left: the absolute magnitude-colour plane. The histogram at top shows the distribution of colour. The sample is divided into blue and red classes following Fritz et al. (2014) at M_U−M_V + 0.25z = 1.1. Right: the sample is further binned by redshift and absolute magnitude. The luminosity bins account for the mean evolutionary trend. The faintest luminosity bins are not volume limited and the thick blue and dashed red curves show the limiting magnitudes for blue and red galaxy classes.