Globular clusters in the Fornax Cluster. Filled circles correspond to the (g − z) versus [MgFe]’ values measured in the Fahrion et al. (2020) sample of globular clusters in the Fornax galaxy cluster, with the color coding representing their total metallicity. The background model grid shows the FASTAR predictions for different ages and metallicities, with the (g − z) and [MgFe]’ values, coming from the FASTAR photometric and spectroscopic sets of predictions, respectively.