Schematic illustration of the expected change of the structural properties of local cSED galaxies when shifted to z ∼ 1. The two main types of cSED galaxies are shown with SDSS images in panels a and b: The case of a centrally SF-quenched spiral galaxy is exemplified by NGC 309 (Breda & Papaderos 2023), whereas Haro 3 is a typical BCD galaxy (Loose & Thuan 1986; Kunth et al. 1988) with intense SF activity in the central part of an underlying old stellar host. These two main types of cSED galaxies are sketched in panel c with the SF-quenched and star-forming zones of the galaxy depicted in red and blue, respectively. Panel d delineates the rest-frame optical-to-UV SED of these two zones, with the vertical line marking the 4000 Å break. Panel e attempts a qualitative description of the change in the V-band SBP μ_V (mag/▫″) and V − I (mag) color profile when a local cSED galaxy is artificially redshifted to z ∼ 1 such that the rest-frame NUV emission moves into the V band. Cosmological surface brightness dimming is ignored for the sake of better visibility and because it is canceled out in color profiles. Rest-frame and ObsF profiles are shown with solid and dashed curves, respectively. In the case of a cSED galaxy such as NGC 309, the SF-quenched bulge experiences a dimming, whereas the opposite is the case for the surrounding star-forming disk. This results in a systematically underestimated B/D ratio and in an amplified bulge-to-disk color contrast with increasing z, and thus also in a steepening of the radial color gradient within the bulge (upper diagram in panels e and f). The opposite is the case in a cSED galaxy with a central starburst, such as Haro 3: in this case, the strong UV emission of the star-forming component leads to a surface brightness enhancement of the ObsF V-band emission simultaneously with a dimming of the surrounding older stellar host, and hence to an increasing starburst-to-total luminosity ratio (lower diagram in panel f). Similar yet reverse to the situation before, radial color gradients are amplified.