Sources on the sky (north is up, east is left) and their classification (see Sect. 3). Filled blue squares indicate candidate HB members; filled dots likely RGB/AGB members; open dots RGB/AGB-star candidates, based on the c₀ selection, that were rejected by a metallicity criterion; and grey crosses likely cluster non-members. Grey areas are masked out and reflect chip gaps, vignetting, and areas heavily contaminated by bright stars. The dashed red circle has a radius of 10.5 arcmin (267 pc at the distance of NGC 2419), beyond which we assume detections to be non-member stars for the purpose of estimating the contamination in our cluster member sample in Sect. 3.4.