Table 2. Interclass correlation of CIEL*a*b* measurements within the study cohorts.

TF+DSLR: Twin flash + Digital single lens reflex camera; RF+DSLR: Ring flash + Digital single lens reflex camera; SMART: Smartphone camera; IOS: Intraoral scanners.

	Group	Mean	Lower limit	Upper limit	P-value
L* value	TF+DSLR	0.915	0.478	0.961	0.002*
	SMART	0.936	0.348	0.974	0.002*
	RF+DSLR	0.848	0.228	0.936	0.005*
	IOS	0.994	0.984	0.996	0.765
a* value	TF+DSLR	0.963	0.674	0.981	0.323
	SMART	0.942	0.571	0.972	0.345
	RF+DSLR	0.968	0.768	0.984	0.546
	IOS	0.994	0.974	0.996	0.786
b* value	TF+DSLR	0.986	0.892	0.994	0.865
	SMART	0.992	0.935	0.996	0.876
	RF+DSLR	0.999	0.991	1.000	0.578
	IOS	0.939	0.994	1.001	0.977