While sometimes you may purposefully wish to fade out your hair dye, other times you dye your hair hoping the color will last a long time.  In these instances, it can be really frustrating if the color is fading too quickly.  There are a few different reasons why your color may be fading too quickly.  These include: Not allowing enough color processing time Coloring hair that is lacking in moisture or protein without first repairing it Rinsing the hair dye out using hot water Not waiting at least 24 hours after coloring your hair to shampoo it Not using color-safe hair products