**Table 8:** Mean colour gradients for the subtypes of ellipticals, respectively diE and boE. The unE are always intermediate. The S0 NGC 5866 was rejected.
Subtype	Grad.	N	Mean	Sigma
diE	$\Delta _{UB}$	12	$-0.167\pm .012$	.042
boE	$\Delta _{UB}$	13	$-0.144\pm .007$	.025
diE	$\Delta _{BV}$	20	$-0.072\pm .004$	.020
boE	$\Delta _{BV}$	14	$-0.057\pm .004$	.015
diE	$\Delta_{BR}$	12	$-0.089\pm .008$	.028
boE	$\Delta_{BR}$	13	$-0.072\pm .005$	.019
diE	$\Delta_{VI}$	17	$-0.081\pm .010$	.041
boE	$\Delta_{VI}$	13	$-0.038\pm .005$	.019
diE	$\Delta _{VJ}$	19	$-0.166\pm .023$	.100
boE	$\Delta _{VJ}$	14	$-0.105\pm .017$	.064
diE	$\Delta _{VK}$	19	$-0.262\pm .028$	.121
boE	$\Delta _{VK}$	14	$-0.187\pm .022$	.081
diE	$\Delta_{JK}$	20	$-0.104\pm .007$	.031
boE	$\Delta_{JK}$	14	$-0.076\pm .007$	.028