Had colour consultation at hairdressers today - it all turned into white noise but I did remember her saying 3 things - roots/foils/lowlights.
My dark brown hair is too dark after years of home dye so I want a lighter effect - suggestion was lowlights - goldenish/copperish streaks? - but what happens when my grey roots start showing through on the top of my head - will they have to be dyed dark brown, and will more lowlights have to be put in on the top of my head? Or don't lowlights go in at the top? Aaarghhh.
How does it all work? So confused 
Thank you if anyone is patient enough to explain how it works.