How to stop blonde hair going yellow?

To keep blonde hair from going yellow, use a purple shampoo once or twice a week to neutralize warm tones. Reduce mineral buildup caused by hard water by using a shower filter or a clarifying shampoo such as Metal Detox cleansing cream shampoo . Always protect hair from UV exposure which causes oxidation and brassiness.

How to care for blonde hair?

Blonde hair needs a gentle care routine which includes colour-protecting and moisturising products. Use a purple shampoo once or twice a week to prevent brassiness, deep condition regularly, reduce heat styling, and minimise the environmental factors impact such as hard water and UV rays. Consider a gloss or toner every few weeks to add extra shine, and add extra nourishment for bleached hair with Blondifier Instant Resurfacing Concentrate .

Why does blonde hair get brassy?

Blonde hair turns brassy due to oxidation, product buildup, excessive heat styling and environmental factors such as UV rays and pollutants. Over time, those factors, as well as hard water and chlorine, break down cool tones in hair and cause yellow or orange discolouration. If the hair is coloured, the blonde tone fades, resurfacing a natural colour. To reduce brassiness, use a purple shampoo, protect hair from sun and heat, and rinse hair with filtered water after washing where possible. Regular toning treatments also help maintain a cool blonde shade.

Blonde Hair Care: Essential Tips and Treatments

3 min read

L'Oréal Professionnel Team

19/05/2026

Blonde Hair FAQs

How to stop blonde hair going yellow?

To keep blonde hair from going yellow, use a purple shampoo once or twice a week to neutralize warm tones. Reduce mineral buildup caused by hard water by using a shower filter or a clarifying shampoo such as Metal Detox cleansing cream shampoo. Always protect hair from UV exposure which causes oxidation and brassiness.
How to care for blonde hair?

Blonde hair needs a gentle care routine which includes colour-protecting and moisturising products. Use a purple shampoo once or twice a week to prevent brassiness, deep condition regularly, reduce heat styling, and minimise the environmental factors impact such as hard water and UV rays. Consider a gloss or toner every few weeks to add extra shine, and add extra nourishment for bleached hair with Blondifier Instant Resurfacing Concentrate.
Why does blonde hair get brassy?

Blonde hair turns brassy due to oxidation, product buildup, excessive heat styling and environmental factors such as UV rays and pollutants. Over time, those factors, as well as hard water and chlorine, break down cool tones in hair and cause yellow or orange discolouration. If the hair is coloured, the blonde tone fades, resurfacing a natural colour. To reduce brassiness, use a purple shampoo, protect hair from sun and heat, and rinse hair with filtered water after washing where possible. Regular toning treatments also help maintain a cool blonde shade.