Depending on the level or amount of orange or yellow that is in your hair, It is governed by the amount of violet or blue in your toning shampoo some only contain small amounts of violet, these are more suited to counteract yellow pigment an neutralise your results, but if you hair is very orange you will need more blue pigment in your shampoo. But be careful if you’re hair has both orange and yellow because the blue pigment needed to neutralise the orange could make the yellow in your hair either blue or even green Always consult with your stylist your concerns.