I made the decision not to color my greys at 30, as I saw my parents struggle with stopping the ritual. It's a personal decision and the societal whispers will die down and in the end it is all about what makes you feel happy. I too get that my face looks too young and I need to color my hair to match my face, but I beg to differ. Young and old are relative constructs. You will do it when it comes from within and until then, there is no judgment.