Transmission curves of HST and Euclid filters considered in this work. The five HST filters F606W, F814W, F105W, F125W, and F160W are shown with coloured solid lines, while the four Euclid bands I_E, Y_E, J_E, and H_E are represented by the coloured areas. The vertical black dashed lines indicate the wavelengths where the response of the HST F814W, F125W, and F160W filters begins to dominate over the F606W, F105W, and F125W filters, respectively.