(F439W − F569W,  F569W) (left) and (F170W − F569W,  F170W) (right) CMDs of NGC 1850. Target stars associated with NGC 1850A, NGC 1850B, and the LMC are marked by red, blue, and green dots, respectively. The Marigo et al. (2008) isochrones with ages of 15 Myr, 90 Myr, and 10 Gyr are plotted in both panels with cyan, magenta, and black solid lines, respectively. We adopted the distance modulus (m − M)₀ = 18.50 (Niederhofer et al. 2015) and the reddening E(B − V) = 0.13 (Górski et al. 2020).