I have natural dark blonde ashy hair that has been dyed a dark rich brown. I've fallen out of love with darker hair as I've had it for a few years and at first I loved it but no its a bit samey. So I'd like to work with my natural colour and have some lighter bits too. When the hairdressers open I'll have a big lot of regrowth but probably only halflat down my hair. Can it be dyed when it's still got the brown on or do I have to grow it right out. It's such a boring colour and my natural isnt much better!