Color-magnitude diagram of the GC candidates, zooming into the plot shown in Fig. 3. The black dots represent the full sample of point-like sources in our field. The red dots are the 3818 GC candidates defined by the two-color and magnitude selection applied for the analysis in previous sections. The blue lines represent the more inclusive single color (g′−i′)₀ selection that we adopt for the analysis of the GCLF, see text for details. This corresponding sample yields 6755 candidates for the calculation of the GCLF.