Best current price£28.22from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£28.22Visit shop Kevin Murphy +Code Permanent Hair Dye 4.21/4Ba Beige Ash 100 Ml
Visit shop2 offers from £28.22
View price history by clicking the chart icon.
The Kevin Murphy +Code Permanent Hair Dye (4.21/4BA) is designed for adults seeking professional-grade, salon-quality color results at home. This permanent hair dye provides deep, vibrant, and long-lasting coverage, making it an excellent choice for those looking for a sophisticated beige tone. While it offers transformative color, it is a professional-strength product that requires careful application and adherence to chemical safety protocols to achieve the best results without damaging hair integrity.
| Age Group | adult |
|---|---|
| Colour | Beige |
| Gender | Unisex |
| Model Part Number | 4.21/4BA |
| Brand | Kevin Murphy |
Yes, for optimal results, use the recommended developer strength associated with the Kevin Murphy professional range.
It is recommended to consult with a professional colorist before applying permanent dye to bleached or highly porous hair to avoid color banding or unpredictable results.
Typical root touch-ups are performed every 4 to 6 weeks, depending on your individual hair growth cycle.
While effective on most hair types, those with extremely damaged or fragile hair should prioritize deep conditioning treatments before and after coloring.
The 4 indicates the level (medium brown), while the .21 and 4BA refer to the specific cool beige reflects within the color family.
Ensure hair was evenly saturated during application and check that the developer volume matches the desired level of lift.
Stop application immediately, rinse thoroughly with cool water, and perform a skin patch test before future use.
Avoid washing hair with high-temperature water and switch to sulfate-free, color-depositing maintenance products.
To prepare, ensure you have a non-metallic bowl and brush for mixing. Mix the dye with the appropriate volume developer following the brand's ratio guidelines—typically a 1:1 or 1:2 ratio depending on the desired lift. Protect your clothing and hairline with a barrier cream to prevent staining. After processing, wash the hair with a professional-grade color-safe shampoo and conditioner to lock in the pigment and smooth the hair cuticle. Avoid heat styling for 48 hours following the application to allow the color molecules to fully stabilize.
