I have never colored my hair, it is brown with gray starting to come in at age 54. Why would I want to color it - this is who I am. I hate that look of gray hair dyed brown, looks like a fake fur coat. And gray roots showing - yuck! Not for me.
After seeing what my SIL went through trying to ease off coloring her hair at age 60, I'm glad I never started. It took her years to find a style/color (ash blond) she was happy with, after being a brunette.