If your hair was dyed too dark (dark brown when you have medium brown hair) with an unnatural mahogany red tone to it, how can you get rid of the mahogany without stripping your hair? I mean would a toner with a lighter brown color (and no red tones) cover the mahogany? Or is a toner semi-pemanet meaning the same mahogany color would come back after it washed out in a month or so?