Oh wow! You are officially my new hair goal.!
Resentfully, though - I'm stuck with dark roots because my hair was dyed black for years, but I'm a natural dark blond and want to wear my hair natural now. So my stylist bleached the hell out of it and the result is somewhat of a dark auburn, even with toner

It might now be healed enough that I could go back for another bleaching ...
But before my black phase I had the two-tone thing happening with grown-out highlights, I think!
ANYWAYS now since I'm resigned to this horrific process of growing out this dark brunette, perhaps I'll try for a two-tone faded look! It looks awesome on you, kissablekae.