In general, permanent color will remain on your hair until your hair grows, exposing the roots. Usually, this takes between four and six weeks before you need to go back and get your roots done. The four to six week window is also when the permanent color will begin to fade (usually after around 28 shampoos).
Consequently, how can I make my hair color last longer?
How to Make Your Hair Color Last Longer
- Avoid Hot Showers. Hot water doesn't only dry out your skin; it can decrease the life of your hair color, says CHI stylist Shawnee Heltsley.
- Swim Smarter.
- Don't Overuse Hot Tools.
- Wait to Wash Your Hair as Long as Possible.
- Try a Shower Filter.
- Prep Your Hair Before Coloring.
- Use a Thermal Protectant.
- Deep Condition Less.
How long should I wait to wash my hair after I color it?
"After having your hair colored, wait a full 72 hours before shampooing," says Eva Scrivo, a hairstylist in New York City. "It takes up to three days for the cuticle layer to fully close, which traps the color molecule, allowing for longer lasting hair color."