Δ_{CF275W,F343N,F438W} vs. Δ_F275W,F814W ChMs for MS stars with 17.25 < m_F814W < 19.10 mag (left panels) and m_F814W vs. C_{F275W,F343N,F438W} pseudo-CMD (right panel) of stars in the central field from Milone & Marino (2022). The probable 1P stars are coloured crimson, whereas the five groups of 2P stars, namely α, β, γ, δ, and ɛ that we selected from the ChM, are coloured pink, orange, aqua, cyan, and blue, respectively. The solid lines superimposed on the diagram in the inset of the right panel represent the fiducial lines of the six stellar populations, while the corresponding fiducial lines of equal-luminosity binaries are represented with dotted lines.