Color

• The hardest part about dyeing roots is trying to match the original hair dye. It's recommended to purchase a boxed color kit from the same brand as the original dye or to go to the same colorist who did the first dye job in the salon. That way the chances for cohesion are greater.
  
  

Touch-up Kits

• The easiest way to dye roots at home is to use a root touch-up kit. The most well-known brand of these kits is Clairol, but there should be a good selection of multiple brands at most larger drugstores. The kits include a brush with bristles resembling a small paint brush that lets you simply coat the roots with the new dye. Then all you have to do is rinse it off after a preset time, usually about 10 minutes.
  
  

Box Dye

• A root touch-up kit is not required, however. In fact, a regular box of hair dye is a better option if no matching kit is available. To dye roots using this method, do the following:
  * Wet the entire head of hair and part it with a comb.
  * Brush the hair dye onto the roots and let it set for the time stated on the box minus 5 minutes.
  * Comb through the hair to close the seams in color.
  * Apply the remaining dye to the rest of the hair for the remaining time.
  * Rinse and condition.
  
  

Warning

• Never keep extra of the original box dye to use on roots later. Once the dye is mixed, it can be highly reactive and is not safe to store. Plus, it won't look good after sitting around for 6 weeks.
  
  

Emergency Fixes

• If you need your roots covered in minutes--say, before that big job interview--you can use hair tint, colored mascara or even eyeliner. The results may not be as lasting, but they will certainly work in a pinch.
  
  

Considerations

• Some people choose not to dye their roots at all and just let them grow out naturally. In fact, this can even be fashionable. Blond hair with dark roots was a popular Hollywood hair trend in 2007 and 2008 and is certain to emerge again.