If your color isn't lasting, try changing up your hair care routine.
1. Washing your hair too often
"Color's worst enemy is water," colorist Ruth Roche told Good Housekeeping. The chemicals in hair dye make your hair more vulnerable to water's effects. This doesn't mean you need to stop taking showers -- just make simple tweaks to your routine, like avoiding excessive rinsing: "Once you've shampooed and conditioned, don't tilt your head back and let the water just run over it for several minutes," says Teca Gillespie, a scientist with P&G. Instead of shampooing your hair every day, try using a dry shampoo at the roots to soak up oil. Also, stick to lukewarm or cool water. "Heat makes dye leach faster: The hotter the water is, the quicker the color loss," says Jeni Thomas, Ph.D., senior scientist for Pantene.
2. Not using a conditioner for color-treated hair
Dyed hair is more likely to become dry and brittle, so treat it with plenty of conditioner specifically formulated for color-treated locks.