Color-magnitude diagram of M4 in Johnson passbands using photometry from Stetson et al. (2014, 2019). The stars targeted by our study are identified by the colored star symbols; the stars in Howell et al. (2022) are shown as colored points. V6 & V42 overlap in the plot, which is indicated by the dual colored marker. The photometry has been corrected for dust using the Alonso-García et al. (2012) and Pancino et al. (2024) maps. The Gaia membership sample (gray) is from Vasiliev & Baumgardt (2021).