I go back and forth. I am 71 and have silver hair all except at the neckline it is still dark. I used to get my hair "frosted" that was before they started calling it highlights and I paid good money to get it bleached out white.. LOL. I now stay silver, my husband loves it and I get lots of compliments on it. I like to wear bright colors and it really accentuates the silver. I have a friend that is 3 years older than I am and she colors her hair dark brown. Her hair is very thin and I keep trying to get her to go lighter, your scalp does not show up so much. I have lots of friends my age that still color their hair dark. There comes a time when( IMO) it would look better a little lighter. No one in their 70s still has naturally dark hair.. When you start fighting mother nature, it doesn't work.