i'm 56 and was born with white hair. at 50 most of my hair was white, except for a small patch on the back top side of my head. That is dark! I dye all of my hair very light blond to cover the white. I do it at home for $2.97 (Walmart).
You can't tell the difference. It's cheap and gives me a bit of color from all that white. Not a grey hair on my head, just WHITE! Both of my grandparents were white by the time they were 50.