Don't be afraid to try again!
My story is I am 81 and my hair WAS patchy shadea of light and darker gray.
I bought a box of the lightest possible blond shade, and put it on, YaY! the gray is gone and my hair is a kind of palest champaigne color!
With some trepidation, I went to our local senior center.
Nobody said a word - not one!
....but in the following few weeks quite a few ladies appeared with new hair color! LOL!