r vs (r − i) CMD illustrating the effect of accretion on the OmegaCAM photometry of our targets. For each star, the white star-like points are derived from synthetic photometry performed on the de-reddened X-Shooter spectra, and include both photospheric and accretion-related emission; the yellow crosses correspond to the expected photospheric emission, estimated by interpolating their positions on the HRD using the stellar parameters derived with FRAPPE and the PISA isochrones. The two measures for each star are connected with a dashed line. We use the same marker scheme as in Figure 3 for the CMD−old and the CMD+HRD− old subsamples. The black arrow indicates the effect that 1 mag of extinction would have. The solid grey lines show the location of 0.1, 0.5, 1, 3, 10, and 20 Myr PISA isochrones (Tognelli et al. 2011).