I have naturally mousy brown hair that I recently had dyed with a semi at the hairdressers to cover a very small amount of greys. Initially the colour looked great but now it’s fading and becoming very warm and brassy. I’m assuming I need a blue/green toner but I can’t find anything online - only toning shampoos.
Can you recommend a product to use? Hate the warmth of my hair and want it back to being a cool ash brown. Thanks!