J − Ks color map of NGC 253 and an enlargement of the nuclear region (bottom panel). Lighter colors are redder J − Ks values. The isophote corresponding to the disk break (white dashed line) is overlaid on the image in the top panel. The blue ellipses overlaid on the enlarged image (bottom panel) indicate the regions where the nuclear ring (solid line) and the ring at the end of the bar (dashed line) reside.