g − r color profiles of sample galaxies, with radii normalized by the radius of the outermost break. In the case of Type I galaxies, the profiles are normalized instead by the disk scale length. Curves and points in shades of red through purple denote individual galaxy profiles, with the total number of profiles in each panel given as N_gal. Light blue points denote the median of all profiles at each radial bin, with the interquartile range (IQR) shown as the light green shaded region. For panels with N_gal <  20, we show the median values and IQRs only where all galaxies contribute; for those with N_gal >  20, marker transparency is calculated as the number of contributing galaxies at that radial bin divided by N_gal. The blue curve in the lower right panel shows the color profile of NGC 5676, the only Type IIIs galaxy in our sample with an extended blueward color gradient (see text).