CMDs of NGC 2419 and verticalised RGB colour distribution obtained through the LBT observations. Left-hand panel: I, C_uVI CMD of NGC 2419 from the LBT stars in common with the HST catalogue. Red and blue dots are objects classified in the HST dataset as FP and SP stars, respectively. Right-hand panels: top panel shows the verticalised distribution of the C_uVI colour. Red and blue dots are the same as in the left-hand panel. The vertical line is adopted as the separation between FP and SP stars for the LBT stars observed in the area complementary to the HST FoV. The bottom panel shows the histograms of the verticalised C_uVI distributions for FP and SP stars.