Rest-frame U − V colour distribution in the different redshift bins, split into three broad SED galaxy types of blue galaxies (Sc/Sd and SB/Irr, blue histograms), green galaxies (Sa/Sb, green), and red (E/S0, red). The dashed line in each panel indicates the adopted separation for red and blue galaxies, defined by a fit to the local minima of the colour distributions. The colour-bimodality separation is also a good representation of the different SED types of early-type and late-type galaxies.