Colours estimates for Galapagos-2. Each small sub-panel on the left part of the plot shows the measured versus true colour (magnitude difference) for a pair of bands: the colour is always x-axis label – y-axis label. The numbers in each panel are the NMAD and η, as defined in the text. The upper larger panel shows the values of NMAD and η for the colours of all bands with respect to I_E, as reported in the legend. The rightmost larger panel shows the I_E − g versus I_E − H_E colour-colour diagram; points are the measured colours for individual galaxies, while the black lines are density contour levels of the corresponding true colours distribution.