Dd dyed her hair black during the Easter holidays. She did a good job, and it looked stunning, but her roots are showing and she wants to revert to her natural colour rather than continue to dye.
She chose a dye that was described as lasting for a number of washes (27, or something like that), expecting to be back to natural by now, or, at the worst, a darker version of her own colour. But it has barely faded - just gone from blue-black to a more natural-looking black.
Is there anything she can do to get rid of the dye?