I’m pretty dang good about setting personal boundaries, and I’m addicted to advice columns, so I think that makes me qualified to give you my two cents on how to respond to a gray hair insult.
Your parent/sibling/child decides to take it upon themselves to tell you that your gray hair is no good, it makes you look older, and they don’t like it
If they want to keep discussing it, you shut them down with “The topic of my hair is off-limits. As long as I like it, that’s really all that matters.”
If my lovely 80+ year-old Mother-in-Law started wearing her hair in dreadlocks, I honestly can’t say it would ever occur to me to talk to her about it.
Being of the Irish-American persuasion, I have a temper. And I’m contrary. I had a boyfriend once tell me he liked it when I wore jeans and suggested I wear them more often. I STOPPED WEARING THEM FOR YEARS!