My first post in style and beauty - as I'm neither stylish or beautiful it's not somewhere I frequent!! 
I'm after some advice on hair colour and wondering if anyone can help? I currently have dark brown/red hair that I have dyed every eight weeks or so. Beneath the dye I'm now almost entirely grey
which means that as my roots show through they show really badly against my very dark hair.
Consequently I was thinking of going much much lighter (not blonde though!) but don't know whether it will suit my colouring. I have dark eyebrows and dark eyes.
Has anyone else done this successfully? Top tips? Is there a website where I can 'try' different colours with a photo of me (sure I've heard of something like this!).
Any help gratefully received, I've never done anything this dramatic before and don't want to mess up!