Distribution of B and Be stars (in green and yellow, respectively) over F814 magnitude taken from Milone et al. (2018), where the left axis shows the total number of stars and the right axis indicates the Be star fraction in each bin. The top axis indicates the conversion from F814W magnitude into mass taken from the Padova isochrones. Stars brighter than F814W = 16.5 are above the cluster turnoff, where their mass remains mostly constant, but they increase in brightness.