Yes, it does fade over time. Hair fibers oxidize daily from exposure to air and water oxygen, which opens the cuticle and sensitizes strands. This breaks keratin bonds, allowing pigments to escape. To minimize fading, use specialized products for color-treated hair. Extending application time won't help—overloading pigments dulls hair until excess rinses out.
Oil-based colors are gentler, skipping ammonia (and its harsh smell!). Paired with milder alkaline agents that open the cuticle less aggressively, oils deposit pigments deeply while nourishing hair and protecting sensitive scalps from tingling or redness. The result? Shinier, healthier strands. The catch: White hair coverage isn't always 100% (check packaging for at-home kits); it's currently limited to permanent formulas. As L'Oréal Professional color consultant Frédéric Mennetrier notes, “Oil formulas are the future of hair color.”
Not always. If you're blonde to brown and aiming for 3-4 shades lighter, lightening formulas work well. Advanced oil technologies now lighten up to 5 shades on natural or colored hair, regardless of starting shade—no bleach required (try L'Oréal Professionnel's Inoa Ultra Blond service, starting at €35). For brunette-to-platinum transformations, however, bleaching is essential.
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).
