Color–magnitude diagram m_F606W vs. m_F606W − m_F110W (left panel) of ESO 456-SC38 from HST/ACS and WFC3 observations fit with the statistical Bayesian MCMC method (SIRIUS code), based on a grid of BaSTI isochrones. The green solid lines are the most probable solution, and the green region represents the solutions inside 1σ from the posterior distributions. Large red dots are stars identified in Gaia within 25 arcsec of the cluster center. The middle and right panels show the solution computed in the left panel projected over the m_F606W vs. m_F606W − m_F160W (middle) and m_F110W vs. m_F110W − m_F160W (right) CMDs. Stars within 0.15 arcmin of the cluster center are selected.