CMDs for the six star clusters possibly associated with the tidal tails. In each panel the CMD of the field population in the outskirts of NGC 5238 (r> 70.0″) is plotted in grey, and the RGB of three Padova isochrones (Bressan et al. 2012) of age 12.0 Gyr and [M/H]=-2.2, -1.5, -1.0 (from left to right) are plotted as black continuous curves, for reference. For each cluster, stars within a small radial annulus around the cluster centre are plotted as red circles in the ‘on cluster’ CMD, while those of a nearby CF of the same area are plotted as blue circles in the flanking CMD. The limits of the radial annuli are reported in the ‘on cluster’ panels.