What do you have now? Is it dyed or virgin? If dyed, what with?
Brown with lowlights and highlights, I have about 2' of new growth 🙁
Can you add a pic? If it is a lightish brown you could put a pink based purple dye straight over and get a multi tonal purple effect, it would be subtle on the brown areas and bright where the highlights are.
That is light enough to put a good purple over. i would go for special effects Deep Purple, diluted about 1:3 with conditioner.
okay what about my roots.. they are darker