Colour subdivision for the members of M0329, both on the colour-colour plane (V−I versus B−R; left panel) and on the R-band magnitude versus B−R colour plane (right panel). The latter is the plot used to determine which galaxies are red and which are not, according to the recursive red sequence linear fit. The “all-matched” entry in the legend, corresponding to the yellow points, represents the objects in the photometric catalogue that have a match in the spectroscopic catalogue.