Dyed this colour over another brand faded blue. It's gone quite a pretty colour, not as blue as I'd of hoped and I'm sure within another wash my hair will be a grey-green colour. I would recommend washing your hair using cold water, as less dye comes out. Also after rinsing the dye out use conditioner, it seems to prevent the dye from washing out. After reading these reviews I wish I'd left the dye on for longer!