The a) observed and b) synthetic Hess diagrams for the Fornax dSph, out to r_ell = 0.8 degrees. The colours represent the number of stars in each bin, on a logarithmic scale. To allow a better comparison between both Hess diagrams, (black) reference lines are also shown. The BHB, RHB and RC are not present in the synthetic Hess diagram, since they are not modelled in the isochrone set used.