from pink to red

hi there. I have a haircolor problem that i'm hoping someone can help me solve. I used to have purple hair, courtesy of bleaching and semi-perm veggie dye. Over the past couple months the color grew out, until I had 2 inches of medium brown roots and the ends were a very faded sort of purplish magenta. I decided that I wanted to go a nice rich medium red... so I put a soapcap on the ends to strip the purple but only managed to get it up to a dark pink - I didn't want to leave the bleach on for too long and cause damage, as my hair is pretty healthy so far. I then dyed the roots with a permanent color, and they lifted to a nice level 4 or so red. The I put a neutral filler on the ends and applied a demi-perm color (since it's gentler) in the same shade of red. The color took just fine, and the level is even from roots to ends - no darker ends or anything like that - but the problem is that the ends still have that funky pink undertone, so its not the same *tone* from roots to ends. Its very annoying, as one of the reasons I dyed my hair was to have a slightly more "natural" color, for a court date I have coming up - I can't be looking too wild. I really want to get rid of the pink and have just a nice medium red tone to my hair. I know a fair bit about color correction, and I know that green (ash) is the opposite of red on the color wheel and would be used to tone that color down - however not sure what would be the opposite color for pink. And I dont want to drab it down too much as I still want to have some red. Any suggestions? (other than go to a salon - I have absolutely no money for that and feel that I am well-versed enough in doing color to handle this - I just need some advice)