Getting your natural hair color back can take years if you allow it to grow out completely. Using dye to change the color to your original is a faster way to achieve your goal. Clairol claims that permanent color lasts until your hair grows out or is re-colored, while semi-permanent lasts 8-12 washes. However, chemicals such as sulfates that are in shampoos can strip the hair of its dyed color, claims L'Oreal. So, depending on how often and what you use to wash your hair can impact its longevity. However, Using permanent color will help you avoid having to immediately re-dye.
Choosing the Right Color and Dye
Grow your hair so at least an inch of your naturally colored root is showing. This should only take about 2 months, since hair is said to grow 1/2 inch per month.
Go to a store that sells hair dye and look through the color selection. Name brands are popular for a reason, so trying ones from companies like L'Oreal, Garnier, and Clairol may be the best options.
Match the color on the box dye to your natural root. Remember to consider the color of your dyed hair. On the back of most boxes there will be before and after pictures of hair color. Match your hair to the before and your root to the after. If there are no guides, use your judgment.
Dyeing the Hair to Match Roots
Take the dye home and put on a shirt you do not care about or a cape if you have one.
Read the instructions on the box of dye. You may have to mix together two smaller bottles, or just shake up one.
Put plastic gloves on.
Work the dye through your hair by starting right where your natural new growth ends. You may want to comb the dye through the ends of your hair to ensure a more even color job.
Put a cap over your dyed hair. If the box dye does not require a cap, then clip your hair up so that the ends are not dripping. You may want to use your own shower cap if you own one and the box does not supply it.
Timing the Hair Color and Washing it Out
Set your timer or watch the clock to track the time the box says to keep the dye on your hair. It can be anywhere from 15 minutes to an hour.
Lift your cap off when the time is right. Rinse your hair until the water runs clear.
Shampoo and condition as you normally would.