I had quite dark hair, started coloring and continued to do so until I retired. Then let it go to its natural state - a pretty silver - in the back still some salt & pepper. For me - the colored hair just didn't go with the rest of the aging process going on. I keep my hair in a short style which I feel is more becoming to me at my age. The style and cut can also age a person - not just the color. Do what makes you feel good about yourself and don't fret over other opinions.