REALLY!!!! I wash mine everyday but about colour fading...apparently anti-dandruff shampoo strips hair colour, and hot water. My hair dresser told me that and I know when I died my hair at home (only done this once and it was a disaster) my hair was too dark so I washed it loads with anti-dandruff - and it faded dramatically. So if you don`t want it to fade don`t do this!!!
It should stop fading in the next couple of washes, unless its semi-permanent hair dye.