Left panel: optical-NIR color–magnitude diagram of M62 from the VVVX survey, after correcting from differential reddening using the extinction maps in Alonso-García et al. (2012). The Gaia RRL with VVVX photometry are overplotted as large black circles. Right panel: optical-NIR color–color diagram of M62 from the VVVX survey, overplotted with the Gaia RRLs (large black circles). The observed RRL scatter in these diagrams is due to the fact that the VVVX NIR photometry comes from single-epoch observations, and that their photometry is not corrected for differential reddening.