In general, as we age, our skin tone changes as well as the color of our hair. Even if we are not getting gray yet, our hair begins to lose some color. In order to pick a tint color that is becoming, it is best to go lighter as we get older.
Choosing a complimentary color isn't difficult—go lighter (this is more softening to the skin tone and less contrasting). Even on white hair, a very attractive effect is created by tinting the hair a very light blonde. This gives the effect of blonde hair, but does not look harsh or unnatural.