Stellar population and color distribution across radial regions. The first column shows the relationship between Hδ_A and D_n4000 from MaNGA data, while the second column displays the u − g vs. g − z color diagram obtained from SDSS images. The top row corresponds to the inner region (0–1R_e), and the bottom row corresponds to the outer region (1–2R_e). In these figures, blue circles represent LSB galaxies, hollow triangles denote LSB candidates, red stars indicate HSB galaxies, and gray contours outline the distribution of large-size galaxies.