Radial number density profiles for the blue and red GC populations, in the case of a variable (g′−i′)₀ color separation between the blue and red GC populations. The plot show the logarithm of the density of clusters (logΣ) as a function of the galactocentric distance (r), for the blue and red populations defined according to Eqs. (10) and (11). The diamond symbols show the innermost and outermost bins that were not included in the fit, whereas the lines show the best linear fits.