Zoom on the color–magnitude relation for the fLSBs in the direction of Abell 496 with photo-z < 0.2 (142 objects). The red line corresponds to the red sequence for bright galaxies (see text). The green lines delineate the region above and below the red sequence, that we will respectively call red and blue fLSBs. The separation between these two lines corresponds to the approximate 1σ loci,  ± 0.29 mag on either side of the red sequence.