The three CMDs refer to different radius selections. The left panel shows GC candidates within the inner 4′, the middle panel between 4′ and 10′, and the outer panel at radii larger than 10′. The respective area sizes then are related as 1:5.2:25.3. The inner CMD is thus dominated by genuine GCs. In the left panel, spectroscopically confirmed GCs (Goudfrooij et al. 2001b) are marked. Note the blue object at C − R = 0.64, which must be a quite young cluster.