I recently had a hair disaster and needed to fix it and didn't want to dye it again and my friend Ruth, put me onto something called ColourB4 which shrinks the colour molecules so that you can rinse the unwanted dye out of the hair.
But if there is any word of advice that I can give you, if there is a permanent colour you want to try, first try it out in a non-permanent colour. This way you know whether or not the colour works. Or even better....go to the salon to dye your hair.
My other Friday Fav is my much loved Touch of Silver by Pro:Voke range. I now have the twice a week shampoo, the daily shampoo and conditioner, dry shampoo and the hairspray! My hair is NEVER going to go brassy EVER again!
Each item ranges from £2-3.00 so aren't expensive which makes it easy for everyone to have great hair.
There is a three step system which I am now following.
STEP1: Brighten - Twice a week Brightening Shampoo which has a violet pigment that helps eliminate brassy, yellow tones. The reason this works to eliminate unwanted yellow tones is because purple is a complementary colour of purple. They effectively cancel each other out. (just a little artistic jargon for you).