Colour–magnitude diagram (CMD) of the full sample (14 563 galaxies) in three redshift bins. The red (solid) line indicates the location of the red sequence found by Willmer et al. (2006), while the green (dotted) and blue (dashed) lines are the limits below (bluer than) which galaxies are considered green and blue, respectively. The small panels below each CMD shows the colour distribution of blue, green and red galaxies.