Shampoos

Yes, purple shampoo and violet shampoo are the same product — the terms are used interchangeably. Both refer to a toning shampoo formulated with violet pigments that neutralize brassy yellow tones in blonde, bleached, or highlighted hair. The colour purple sits opposite yellow on the colour wheel, which is why it's used for both names.

Blonde hair turns brassy because underlying warm pigments (orange and yellow) are exposed as hair lightens, especially with bleach, sun exposure, and hard water. Purple shampoo counteracts this by depositing cool violet tones that cancel out brassiness on the colour wheel.

Purple shampoo targets yellow and brassy tones and is best for light blonde, platinum, and highlighted hair. Blue shampoo targets orange tones and is better suited for darker blonde, bronde, or brunette hair with warm undertones. Choosing the right one depends on your base colour and which unwanted tone you're trying to cancel out.

Most blonde hair benefits from purple shampoo 1 to 2 times per week. Overuse can leave a slight purple or grey cast, especially on very light platinum tones. Alternate with a hydrating or repair shampoo on other wash days to maintain moisture and prevent over-toning.

Yes, Blacklight Blonde Science shampoos are formulated without sulfates. Sulfate-free formulas cleanse gently while helping preserve moisture and colour vibrancy, which is especially important for blonde, bleached, and chemically treated hair that's more prone to dryness and fading.