At what age do you think someone should stop coloring their hair?

I recently thought I was going to stop coloring my hair. I lasted until I saw 3 inches of roots and gave in.

At what age do you think a person should stop coloring their hair?

Is there an age when everyone knows for sure you are doing it and it does not look right anymore?

I know it is completely different for men. They look distinguished with gray hair but things are different for women.

My grandmother colored her hair until she passed at the age of 94 and I didn’t think anything of it. Now I am getting older and I am questioning when I should stop.