Yes, you can use purple shampoo on dark ash blonde hair to combat yellow/brassy tones and maintain its cool, ashy hue, but it's most effective on lightened hair (level 8 or higher); for very dark hair, blue shampoo might be better for orange tones, and using purple too often can lead to a purplish or dull look. It works best as a toning treatment (not everyday shampoo) to keep the ash looking fresh, especially after highlights or balayage, but don't expect dramatic color changes on naturally dark hair.
Purple shampoo is an effective, low-effort maintenance tool to neutralize yellow-brassy tones and help preserve ash blonde between salon visits, provided you use the right product, control timing, and supplement with conditioning and occasional professional toning for stubborn warmth.
When formulating your shade, your colorist will likely use a copper or golden tone to counteract the ash.
Purple shampoo can be drying, especially for grey hair , which tends to be more porous. Using it too often can lead to dullness or purple cast on grey hair and increased dryness or brittleness, especially if your hair is already fragile. So just use the Olaplex once a week.
It's important to note that the pigment in purple shampoo isn't a lightener or hair dye but a gentle toner that works overtime. So it can't darken your hair or make it any lighter. For this reason, if your hair tone is too dark, it won't make it any brighter.
Your hairdresser likely advised against purple shampoo to prevent dryness, dulling, uneven color (ashy/muddy), or over-toning (purple/blue tint), as it's a temporary fix not for everyday cleaning, and can interfere with future coloring by creating buildup, especially if your hair is very porous or already a bright, cool blonde. They might prefer professional toners, moisturizing treatments, or detox shampoos for better, healthier results.
If you have any kind of blonde treatment in your brown hair, purple shampoo is for you. Purple shampoo in brown hair works similarly to how it works for blondes; neutralizing brassy tones in lightened sections of hair.
The truth is: purple shampoo itself doesn't cause hair loss, but the wrong formula or overuse might contribute to other issues that lead to breakage or increased shedding. Here's what to watch out for: Dryness from harsh ingredients or over-toning. Buildup on the scalp if the product isn't rinsed properly.
While your stylist provides that crucial initial toning, you can typically begin incorporating Redken purple shampoo approximately one to two weeks after your professional salon service, or as soon as you first begin to notice any subtle hint of brassiness returning.
There's no single "ugliest" hair color, as beauty is subjective, but natural red hair is often cited as least popular in attractiveness studies due to rarity and stereotypes, while some find unnaturally dyed colors (like harsh yellow blonde from bleaching, flat coal black, or certain aggressive fashion shades) less appealing, or simply, a color that clashes with a person's skin tone.
Dark ash blonde hair is a cool-toned shade that blends deeper blonde and light brown hues with subtle, silvery undertones. The result is a soft yet striking color that offers dimension and a polished, modern finish.
The hardest hair colors to remove are typically black and vivid reds, due to their dense pigment load and strong staining power, often requiring multiple bleaching sessions; while vivid blues and purples are also very difficult, especially cool-toned ones, because their small dye molecules deeply bond to porous hair, making them stubborn to lift.
Although purple shampoo is a bit different from the shampoo you might be accustomed to, using this colorful haircare product doesn't have to be intimidating. In fact, many people regularly use this color safe shampoo to neutralize the yellow undertones that can sometimes appear in blonde, bleached, gray or white hair.
Purple Shampoo – Best for Yellow Tones
Purple shampoo suits platinum, icy, ash, beige, and most highlighted blondes experiencing yellow brassiness. The violet pigment directly counteracts banana-yellow tones that appear when ash toners fade.
Combo Strategy: Some people use both toners and purple shampoo. Toners help you achieve the initial colour, while purple shampoo helps you maintain it.
The main downside of purple shampoo is that overuse can lead to hair becoming dull, dry, brassy, or even tinted purple/ashy because it deposits pigment and can strip moisture, so it should be used as a treatment (once or twice a week) rather than a daily shampoo, with plenty of conditioning afterward to counteract dryness. It's a toner, not a cleanser, and excessive use can build up, making hair darker or harder for stylists to work with.
Purple shampoo will not fade or remove red color but can impact its visual effect. A purple shampoo used sparingly can help remove bronzy and brassy tones. However, if you are trying to achieve a vibrant orange and red, which are warm tones, using a purple shampoo too often can tone down the vibrant visual effect.
Avoid Heat Styling
Heat styling with a curling iron, flat iron, or crimper can cause color to fade severely on color treated hair. You should always use a heat protectant before using hot tools on color treated hair. Heat dehydrates hair and causes damage to the strands, meaning pigment escapes from the hair strands.
While the violet tones in purple shampoos can help bring blonde back to life, it does this by adding more toner; in effect, covering up the mineral coating on the hair cuticle. The more you shampoo with tone-correcting products, the more buildup you create — and the darker your blonde looks.
The "Big 3" in hair loss treatment refers to a popular, multi-pronged approach using Minoxidil, Finasteride, and Ketoconazole shampoo, targeting different aspects of hair thinning (like circulation, DHT, and inflammation) for potentially better results than single treatments, often used for androgenetic alopecia (male pattern baldness). While Minoxidil promotes growth, Finasteride blocks follicle-shrinking DHT, and Ketoconazole reduces scalp inflammation, sometimes Microneedling replaces Ketoconazole as a "Big 3" component.
What are the worst shampoos for hair loss?
Blue neutralizes orange, red, and copper undertones. Like its purple counterpart, it helps to correct brassiness in your hair color. However, blue shampoo is most effective for brunettes rather than blondes.
It helps keep your hair color looking fresh-from-the-salon blonde by neutralizing and removing brassy and yellow undertones. In practice, a purple shampoo is a way to maintain the tone of your blonde – one that you can easily apply to your hair at home.
According to color theory, complementary colors effectively cancel one another out when mixed together. So using a purple shampoo over brassy brunette hair can help neutralize those yellow tones to reveal a more neutral or cool-toned hair color.