My natural hair color is dirty blonde. I dyed it dark brown about six months ago and the color faded some. So this past weekend I wanted to go back to my original color. I tried a brand called ion and the color was light blonde. It came out an auburn color. Then we tried hi lights on top and they are really blonde almost yellow. What color should I use to try and fix this mess.l Basically it is auburn and blonde hi lighted... please help

To eliminate the yellow, use a violet toner. You can purchase this from many beauty stores. :)