By looking at color theory and choosing the opposite color of your hair in the color wheel, such as purple or blue shades, you can neutralize the yellow and orange.
Purple Shampoo and Conditioners: Purple shampoos and conditioners contain purple pigments that help neutralize the yellow tones in hair. When applied, the purple pigments coat the hair strands and interact with the yellow tones, effectively canceling them out.
Purple shampoo or purple semi-permanent toner would be the easiest solutions. It doesn't matter if the yellow is natural or from dye or from bleach, purple tones yellow.
If you're seeing yellow more than you' are seeing Orange, use a violet-based shampoo. Violet is light purple and purple neutralizes yellow. These types of shampoos have direct dyes in them that stain over the top of the hair. The more often you use them the more direct dye is overlaid on the hair shaft.
Vinegar Rinse: Mix equal parts of white vinegar and water, apply it to the hair, leave it for a few minutes, and rinse. This can help tone down brassiness. Chamomile Tea Rinse: Brew strong chamomile tea, let it cool, and use it as a rinse after shampooing. It can brighten blonde hair.
Tone it up with blue or purple shampoo
You'll either need a blue or purple toning shampoo that helps neutralize brassiness to reveal the lighter hair color you're aiming for. The key trick here is figuring out which hair toner to use.
Taking the next step in the laws of neutralization, you can conclude that a violet toner or blue violet color formula will cancel out the unwanted yellow or gold tones in your blonde hair color; blue will cancel out the unwanted orange or brassy tones in your brown hair color, which is where products like blue shampoo ...
Recommended Colors for Neutralization
For unwanted yellow tones, purple-hued products are recommended. Orange or brassy tones are best neutralized with blue, while red tones find their match in green.
PURPLE/VIOLET PRODUCTS
Purple/Violet Shampoos are super popular with blondes, and for good reason. They allow you to stay in control of any yellow tones that might appear without drastically changing your hair colour. Tint Department also stocks Purple/Violet Masks.
Purple shampoo is a pigmented shampoo for blondes that neutralizes and removes unwanted brassy, yellow undertones.
One option is to re-bleach the roots to lift them to a lighter level before toning again. You need to get them to that very pale yellow - think the inside of a banana. This will help to ensure that your favourite toner can effectively neutralize any remaining yellow tones and match the rest of your hair perfectly.
Adding the correct complementary color (in this case, violet) is the only way to get rid of the yellow shade. Therefore, you need a pastel toner in violet to complete the process of coloring your hair white.
For warmer undertones (think hints of yellow or orange), your ideal hair color should give your skin a healthy, natural-looking flush. Go for hair colors that are cool, ashy, or have reddish tones, like honey or strawberry blonde hair, golden copper, cool beige brunette, and rich golden brown.
Stylists advise that bleach does not need to go on clean hair, and that it's actually healthier for your hair to be a little oily when you bleach.
Ash cancels the yellow. But make sure to only apply the ash product on the hair that you bleached that are yellow.
I would try a purple/blue shampoo first. Use it a few times a week for a couple weeks. It won't fix it overnight, but you should notice a nice gradual change without damaging your hair more. If that doesn't work, a toner would be your next least damaging option.
Sherwin-Williams' Charcoal Blue has gray undertones that can cool off yellow undertones in surfaces like oak floors.
Purple shampoo adds tiny deposits of color to your hair to counteract yellow and orange shades. If you use it once a week in place of your normal shampoo, it may keep the yellow out of your hair. Choose a darker purple if you have blond hair or a light violet for silver or white hair.
Use a color-depositing shampoo to correct a brassy tone.
Miranda recommends leaving the shampoo on up to 15 minutes to darken the highlights even more. Purple shampoos work best with yellow brassy tones. Use a blue toning shampoo for orange brassy tones. Correct red brassy tones with a green color toning shampoo.
The Wella Color Charm T14 Pale Ash Blonde Hair Toner transforms brassy hair yellow and light orange hair. Gives a cool toned, silvery blonde result. The Wella Color Charm Hair Toners are simple to use and give a salon-quailty finish, all from the comfort of home.
Use an apple cider vinegar toning rinse
Mix everything together and apply after washing and conditioning your hair by pouring the mixture gently over your head. Rinse thoroughly afterwards. You can repeat this process every two weeks to help tone down the brassiness in your hair.
When deciding how to tone yellow hair to ash, try using a violet shampoo first. As purple is the opposite of yellow on the colour spectrum, the shampoo's purple pigment draws out the yellow brassiness from your blonde, neutralises those unwanted tones, and makes your colour look cooler, healthier and more vibrant.
If your lousy bleach job has come out more yellow, you'll need a purple toner. Purple shampoo can help neutralize the yellow. If your hair is orange, you'll need a blue toner. Try a blue shampoo to tone the brassiness and get rid of the orange.