Brassy hair is caused by an overabundance of warm pigments in your hair. For example, when platinum blonde hair becomes too yellow or when golden highlights turn reddish-gold or orange. When you lighten your hair, your natural hair color is lifted to make room for the new color.

How do you fix orange highlights?

When deciding how to fix orange hair, you might try toning the orange out first. Toning neutralizes unwanted brassy tones to reveal a cooler blonde or light brown shade. The trick is figuring out which color toner to use. If your bad bleach job has come out more yellow, you'll need a purple toner.

How do I stop my highlighted hair from turning orange?

To remove an orange brassy tone from blonde hair, you should use a blue/purple shampoo. Hair absorbs a small amount of blue/purple pigment contained in the shampoo, that lead to cancel out orange undertones.