Why brassy hair happens, and how to fix it!

Wave goodbye to those unwanted yellow tones and say hello to our Purple Shampoo + Conditioner, in-shower essentials for all blonde babes!


So you dye your hair blonde, and you notice that a few weeks on, the colour is looking a lot different to when you left the salon.

The objective behind dyeing your hair generally isn’t to have your tresses change from one colour to another as time goes on -  which is why brassy hair is especially annoying. 

It wasn’t the dye mixture applied through your hair in the bathroom or in the salon chair? As it turns out, there are plenty of causes behind the unwelcome arrival of brassiness. 

Brassy hair happens to almost everyone with fair hair, but the good news is, there are ways to reduce brass when it appears, and to avoid unwanted warmth in the first place.  

It is important to understand that everyone’s hair has warmth lurking within. You may not see it, but it’s there. So whenever you lighten your hair—whether it’s to go blonde, lift your dark brown to a lighter brown, highlight your brunette hair or create a silvery or grey color—the dye will remove some of your natural colour, and then deposit the new colour. When your natural colour is removed, the underlying gold or red tones become more visible. If you want your colour to stay cool; ie. cool blonde, cool brunette — the colour formula your hair stylist chooses will contain tones to cancel out that unwanted warmth.

If your hair is dark and you want to be blonde, one method is to lighten your overall colour to a medium or dark blonde and then add lighter highlights. 

It works, but all that colour lifting exposes the underlying warmth in all of your hair. Another option is to keep your base colour as is, and get to blonde by adding highlights. The more highlights your stylist applies, the lighter your overall colour will appear. But there will be less coloured hair overall and therefore, fewer areas that can turn brassy (yay). 

There are many other factors which can contribute to your strands becoming yellow over time, here's some things to keep in mind when you want to protect your mane!

Sun, salt and chlorine exposure


Oxidising is defined simply as - the addition of oxygen. And when hair colour is exposed to oxygen (from the sun or even the air) it begins to fade. When colour fades, it tends to reveal the underlying warm pigment in your hair. So, when you head outdoors, protect your colour from UV exposure and oxidation by wearing a hat or scarf.  

Pools are infused with chlorine because it’s a powerful way to kill bacteria, however its also a form of bleach. Bleach lightens stuff, and that unfortunately includes your hair. And when your hair lightens, that equals warmth. 

This chemical often damages hair by drying it out, in turn, changing the colour. 

It removes natural oils from the hair, causing the loss of hair shine and flexibility, as well as making it more susceptible to damage.

It can alter the integrity of the hair shaft too. Once the bonds are broken, the strands become exposed and weak, causing the ends of the hairs to split. 

It affects the hair cuticle, making it rough and likely to damage or break. 

When strands are damaged like this, it’s difficult for the hair colour to remain intact, because the hair becomes more porous with more physical damage. 

Our hydrating hair masks are amazing for protecting your locks against the sun's harmful UV rays, chlorine and salt water exposure. They contain a natural SPF of 4+ and will also ensure they stay hydrated while you're outdoors.

Your Shower

You may not realise it, but the water coming out of the shower head in your bathroom could be making your hair brassy! That is, if it has a high level of mineral deposits. This type of water can cause build-up in your hair, which then dries it out and makes it prone to damage. Hard water not only leaves mineral deposits in the hair, but it also prevents the penetration and absorption of moisture.

Pollution and Smoke
It’s not always about the products you’re intentionally putting in your hair! Blonde Hair that takes a yellow tone can be linked to smoking or to air pollutants. Perhaps you smoke, or someone in your house does? Exposure to second hand smoke can cause just as many issues. 

Your Hair Products
The shampoo you use could turn those strands brassy, especially if it’s a colour that’s not meant for your current hue or filled with chemicals and ingredients that hair dye is particularly sensitive to!

Some shampoos can strip your hair colour, as well as products that contain parabens + silicones and shampoos with sulphates can also play a part in brassiness. 

If you do have blonde hair, a safe option to give your hair the cleanse it needs is a violet-toned shampoo - our Hydrating Shampoo for Blondes is the perfect option! Don’t be alarmed by its purple shade - it is not going to do any damage to your mane, or dye your hair lavender!

The purple tone in this product actually works to counteract the brassiness that can develop.

You should find that you only need to use our purple shampoo once a week or so. Alternate it with our OG Hydrating Shampoo and boost the super nourishing and hydrating benefits. This combo will ensure your hair  looks soft, healthy, hydrated, and shiny.