Coloration and care 6B Cocoa brown from Les Trois Chenes is a formula for a permanent coloration rich in pure pigments, covers 100% of gray hair from the first application and reveals the shine and shine of the hair, enriched with plant proteins Color & Soin perfectly colors the hair and makes it silky. It is a pioneer of coloring with plant extracts in pharmacies for more than 20 years; Color & Soin is the permanent coloring that takes care of your hair, giving you a professional result. An exceptional, intense and reliable permanent color. Full coverage of grays. Optimal scalp comfort A preliminary test should always be performed. To test, clean a small area of skin behind your ear or inside your forearm with soap and soap or alcohol. Apply a small amount of ready-to-use hair dye to this area and let it dry. 48 hours later, gently wash the skin part with soap and water. If there does not appear to be any irritation or inflammation, there is usually no hypersensitivity to the dye. However, the test must be repeated for each application.