Hi if I strip my dark hair back to my natural color and then apply a violet hair dye what could happen I e being told it will go a different color help

You have to think this through. Your hair is already dyed, and you will be stripping it. Your hair is already very porous from over-working, then you are going to put an unnatural color on it, violet. What colour do you think you are gong to get from the violet colour?