If you have very white or ice blond hair, you may find that your hair has unattractive and undesirable yellow tones.

This can also happen if the bleaching treatment is not applied for long enough.  Other factors can also result in the appearance of yellow tones, such as sea water or chlorinated water. These can even happen to naturally blond hair.

Anti-yellow shampoos are designed to hide these yellow tones that can appear in blond hair. But be careful, as it is not suitable for all kinds of blond! If you want to maintain a nice golden blond colour, or coppery highlights, you must avoid these shampoos, as they tend to eliminate these tones. 

This shampoo is also known as purple shampoo, owing to its colour. If we take a close look at the colour wheel, we note that yellow is opposite purple, just as green is opposite red. This explains why creams to reduce redness are green!

Purple shampoos are also useful for people who wish to maintain their white hair and ensure a striking colour without undesirable yellow tones.