g − r − i combined tri-color images obtained from the SDSS sky server with a field of view of 1′×1′. The upper row shows our six sample dEs. The lower row shows, on the left, blue centered dEs (VCC 0024, VCC 0135, and VCC 0170) from Lisker et al. (2006) and, on the right, typical dEs with old nuclei (VCC 0216, VCC 0308, and VCC 0990) from Paudel et al. (2011).