Ombre hair is such a beautiful look and I don't see it disappearing from view anytime soon. I would never suggest doing it yourself, even if you can buy home kits to do it now. As your hair has been coloured before it won't look like the models on the box.
I need to explain that if you went to the hairdressers they wouldn't be able to remove your plum colour and return you to your natural dark brown shade in one step (even if you only used a semi-permanent shade of plum). If you had to mix two bottles together when you dyed your hair plum then it means it has to a degree permanently changed your natural hair colour.
To remove this colour they will need to strip the hair of the current shade then assess the colour after. They then will need to colour it to try and match your natural hair colour and Ombre it after this.
