I LOVE gray hair, so I can't help you, other than to say "just let it go".
I started getting gray hair when I was 18. By the time I was 30, I had lots of gray and was putting a temporary color in every month (this was 20+ years ago). I went to the hair dresser to get it done, but it was called a "comb through color" it only took her a couple of minutes to put it on and then it had to set for about 5 minutes. I have no idea if they have anything like that now, but you could certainly do that yourself, if they do.
Anyway, when I met my future husband
he said "why are you putting that stuff in your hair", so........ I haven't since! Now that I am 55, my hair is almost completely gray and I get compliments on it all the time. People stop me on the street and ask me how I get my hair this color. My hairdresser laughs because she says you cannot make your hair gray - only blond.
Anyway, my point is that you might want to consider letting it go!
