Colour–magnitude diagram of satellite galaxies. Satellites from BL galaxies are in blue, from BD galaxies in orange, and from the CS in green. Each point represents a satellite galaxy in the sample. While the colour distributions are similar across populations, BL satellites show a noticeable excess at faint magnitudes. For visualisation purposes only one realisation of the CS is shown. Top and right panels show the 1D distribution of r band magnitude and colour respectively. Distributions are shown via KDE (thick lines) and normalised histograms (thin lines).