Table 2. The relationship between perceived age and luminance (L*) or color (a*, b*) contrast.

Feature	Contrast	N	p value	Relationship to perceived age
Brows	L*	150	<0.0001	Decrease
Eyes	L*	150	0.0529	Decrease
Mouth	L*	150	0.4513	None
Eyes	a*	150	0.0009	Decrease
Mouth 1	a*	150	<0.0001	Decrease
Eyes	b*	150	0.0160	Decrease
Mouth	b*	150	0.0069	Increase

¹ Absolute value.