Differences of F336W − F475W, when measured through T and C apertures. The differences are shown as grey lines. The X-axis – the radius of C aperture. The T aperture radius of R_T = 3.0 arcsec is used. Red markers show the median difference for a given R_C, error bars mark the 16th and 84th percentiles. The blue vertical lines mark radial distances equal to double half-light radii, 2⋅R₅₀. The top-row panels show differences depending on cluster mass and age (the cluster radial profile parameters are r_c = 0.2 arcsec and γ = 2.8); meanwhile, the bottom panels show differences depending on radial profile parameters (the clusters of log(M/M_⊙) = 3.0 and log(t/yr) = 8.0). Panel blocks on the left show results when all stars are measured, while the panel blocks on the right show results when PMS stars are subtracted from the aperture photometry results.