Effect of the differential reddening correction on the JWST NIR (top panels) and on the HST optical (bottom panels) CMDs. In both cases, stars have been identified as likely members through proper motion analysis and satisfy strict photometric-quality criteria. Left panels: original CMDs. Right panels: with reddening correction applied. We notice how this process significantly reduces color broadening and reveals tighter evolutionary sequences. As expected, the optical CMD is more strongly affected by spatially variable extinction than the NIR CMD.