Remove Excess Hair Color

Prell shampoo
Q: I understand there is a shampoo that I might use to lighten my hair that I have just colored too dark. Do you have its name? I would be most appreciative.
A: Depending on who you ask this question, the answers can range from "Prell Shampoo" to clarifying shampoo to "Dawn Dishwashing Liquid" since everyone has a theory on this subject. Basically, the theory behind using these products is the same: use a strong cleaning agent to remove excess color and give a "lightening" effect.
Because the color process involves raising the cuticle layer in order to deposit the color into the hair shaft as well as coating the exterior of the hair, these harsher cleansers can remove some of the color that is deposited.
Personally, of the choices listed above I would recommend using either the Prell shampoo if you can find it in your local stores, or one of the clarifying shampoos made by many different manufacturers.
Prell is a shampoo that has been around for a LONG time and was marketed as a shampoo that added "fullness and body" to limp and lank hair. Because the shampoo is so very alkaline it cleaned the hair very thoroughly and removed the oils excess moisture that weighed the hair down.
As other products flooded the marketplace, Prell took a back seat. Clarifying shampoos are designed to thoroughly clean the hair as well and are meant to be used occasionally to remove product buildup and to prepare the hair for certain chemical services, such as perms. Both of these are ideal for removing excess color in the hair after a color service.
See also:
How to color hair
Hair color fixes
Is there a way to fix hair color that is too dark without dying the hair again?
What can go wrong with hair color services