RGB image (SDSS) of the barred galaxy NGC 5921 (left panel). The bar extent is marked in red. Its g − i color profile along the major axis in units of corotation radius (dots) is superposed to the median color profiles of barred galaxies with mass above M_knee and different inclinations (<15 deg, 30 deg, 50 deg). The two dashed horizontal lines mark the color of typical LTGs and ETGs above M_knee.