So as the title says I want to go back to brown hair... dark brown. I used to dye my hair a mahogany color. Quite a while ago I bleached my hair and was rocking just about platinum blonde hair, then I dyed it blue and purple and then just recently red. The arctic fox poison I used I mixed with a bit of there purple and after like 5 washes it's already faded to a magenta pinkish color. I'm waiting for this to fade a bit more then going to redye it with the same colors but with more purple for a darker red color. After that starts to fade out I plan to go to Sally's and get the stuff to go brown.

My question is... do I need to get a red filler or like a red protein filler and put that on before the dye or will I be okay since I have semi-permanent red tones in my hair already before I put the brown on? Looking for advice on what I should use and do before I put the brown in my hair so it doesn't turn muddy or green.