Left panel: VVV CMD for contaminated (grey points) and PM-decontaminated samples (Hess diagram). We show the position in the CMD of the RR Lyrae stars located at 12′ from the cluster centres (black squared) and those considered cluster members (magenta squared). Middle and Right panesl: 2MASS+VVV CMDs for PM-selected members. We fit a family of isochrones (cyan, red, and yellow lines), changing metallicities and ages, respectively. The red line is the PARSEC isochrones best-fit for each cluster (see Table 3).