Purple toothpaste: what the color corrector does and does not do
Purple toothpaste does not whiten your teeth. It leaves a thin violet tint that sits opposite yellow on the color wheel, so your teeth look less yellow for a few hours, and the effect leaves with your next rinse or meal.
Hismile describes its own V34 serum as a concealer for teeth that temporarily hides yellow tones and acts entirely on the tooth surface. This page is general information, not dental advice.
How the violet pigment tricks your eye
Yellow and purple are complementary colors. Lay a faint layer of violet over a yellowish surface and your eye reads the mix as closer to neutral white. Purple shampoo for blonde hair works the same way.
The dye does the work, not an active ingredient. Across the three products below, the color comes from the same pair of cosmetic colorants, Red 33 and Blue 1, blended to a deep violet.
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Nothing bleaches. None of the three lists hydrogen or carbamide peroxide, which is why the shift is optical and short-lived. For what peroxide-free methods can realistically change, see our guide on how to whiten teeth without peroxide.
Three purple products, read from the label
Format matters more than color: a serum does nothing for cavities, while a toothpaste at least cleans while it tints. Figures come from each brand’s page or published ingredient list, with prices as shown in October 2026.
| Product | Format | Fluoride | Peroxide | Violet colorants on the label | Brand page price | Source |
|---|---|---|---|---|---|---|
| Hismile V34 Colour Corrector Serum | Brush-on serum, 30 seconds, then rinse | None listed | None, sold as peroxide-free | Red 33 (CI 17200), Blue 1 (CI 42090) | US$19.99 | us.hismileteeth.com; ingredient list as published on INCIDecoder |
| Moon Purple Color Corrector Toothpaste | Toothpaste that foams light purple | None, fluoride-free with hydroxyapatite | None listed | Red 33 (CI 17200), Blue 1 (CI 42090) | $14.99 | moonoralbeauty.com product page |
| Colgate Optic White Purple | Anticavity toothpaste | Sodium fluoride 0.24% (0.15% w/v fluoride ion) | None listed | Blue 1, Red 33, plus titanium dioxide | Not listed on colgate.com | colgate.com product page, Drug Facts panel |
Only Colgate Optic White Purple carries a cavity-fighting active, sodium fluoride at 0.24 percent. Colgate footnotes its own stain claim: one year of stains removed, when brushing twice daily for three weeks.
Moon leaves fluoride out and lists hydroxyapatite instead, plus papain, a fruit enzyme the brand markets for surface stains.
Hismile V34 is not a toothpaste at all. The published ingredient list has no fluoride and no hydroxyapatite, so brushing with it alone skips the part of brushing that protects enamel.
What the color corrector cannot fix
Intrinsic yellowing, the kind that comes from thinning enamel showing the dentin beneath, sits under the surface. A pigment film on top can soften how it looks, but it cannot change the tooth. Our page on whether whitening toothpaste damages enamel explains why thinner enamel reads yellower.
Grey tones and tetracycline staining respond even less, because violet only cancels yellow. On a greyish tooth the purple can read as dull rather than brighter.
The dyes can also tint dry lips briefly, so rinse well. Hismile’s page has a dedicated FAQ on veneers, crowns and bonded teeth, so read it before using the serum over dental work.
Paste, serum or strips
If you want the tint without giving up fluoride, the Colgate paste is the only one of the three that delivers both in a single step. Moon suits you if you already brush fluoride-free by choice and want hydroxyapatite in the formula.
The serum is a photo-day product. You brush it on for thirty seconds, rinse, and the effect has usually faded by your next meal. The same violet idea now ships as peel-and-stick strips, and we break down how those differ in our piece on purple teeth whitening strips.
For a change that outlasts the day, you are back to abrasives or peroxide, and your dentist is the right person to weigh those against your enamel.