To a degree. Precolour could not remove an unwanted permanent colour. This is absolutely the remit of Decolour Remover. However, Precolour would have a general effect on accelerating fading of direct dyes such as Fashion, Pastel and Colour Restore. If the hair is healthy, a direct dye will fade off in up to 8 washes. In these instances, Precolour could probably boost the removal of the shade by 3 to 4 washes. However, if the fashion colour or direct dye has stained the hair, Precolour could not assist in its removal. Likewise, if the shade is proving stubborn to rinse out, Precolour would not cause it to leave the hair any faster.