Best-fit simulations for the 1G and 2Ge stars in NGC 6752. The grey and black points are the stars belonging to the 1G and the 2Ge, respectively, selected according to the simulation area (red and blue, respectively, for the 1G and the 2Ge). The coloured points, colour-coded in the same way as the simulations, are a typical realisation of each population. Histograms in the bottom panels compare the colour distribution of the two simulations (red and blue) and the selected stars (black). The simulation histograms are normalized to the number of stars included in each population.