There are five primary types:
1. Permanent oxidative coloring is the most common. It delivers long-lasting color by opening the hair cuticle to deposit pigment deep into the strand.
2. Lightening formulas brighten hair by 3 to 4 tones while adding subtle, sun-kissed shades. They perform best on blonde or light brown hair.
3. Decolorization (bleaching) is the most intense, using a strong oxidant like hydrogen peroxide to strip all natural pigment from the hair. It's ideal for dramatic shifts, such as from brunette to platinum blonde.
4. Tone-on-tone formulas offer semi-permanent color that fades gradually. They cause minimal oxidation, so they don't lighten hair but provide natural-looking shine and prevent harsh regrowth lines.
5. Direct or temporary colorings wash out in 2 to 6 shampoos, acting like makeup for your hair. Available in classic and vibrant shades, they shine on light hair and can be found in salons (e.g., Blush Satine by Eugène Perma, Color Fresh by Wella) or stores (e.g., Crazy Color on bleulibellule.com).
Temporary direct dyes don't penetrate the hair shaft, leaving it untouched. For others, damage depends on oxidation strength: the more the cuticle opens, the weaker the hair becomes. Tone-on-tone options sensitize minimally, while bleaching aggressively removes melanin by fully opening the scales. Key tip: With oxidative colors, wait at least 3 weeks between applications to avoid porosity and uneven results.
Yes, these use fewer harsh chemicals (no ammonia or preservatives) and plant-based pigments, reducing stress on hair and scalp. However, without strong oxidants, they can't achieve major lightening. Warm-toned shades dominate—think golden blonde, chocolate brown, or mahogany chestnut—but options abound. Try products like Color & Soin, K pour Karité, or Logona, available at organic stores and salons (e.g., Romain Colors, Schwarzkopf).
Insights from Frédéric Mennetrier, L'Oréal Professional color consultant and colorist at Atelier Blanc (6, rue Mayran, Paris 9th), and Romain, founder of Romain Colors XXVII salon (27, rue La Boétie, Paris 8th).
