I am dark brown, faded brown and grey/silver roots very visible. I am using this opportunity to not dye, although I have a stock of dyes still.
I do hate the severe contrast on my parting. I use Superdrug root spray in brown, just a quick blast on the worst of the parting. I found if I apply it to still damp hair, it lasts even longer, actually through another shampoo and conditioner. It's only £2 at the moment, so a good temporary fix.
I have trimmed my fringe, not perfect but fine for me.