Brilliant - it hardly stained my skin at all. Due to other commitments I was only able to leave it in for around half an hour, however two weeks later and the blue is still vibrant and looks beautiful in the sunlight! I have naturally brown hair, so I bleached it first and then before applying the dye also highlighted it; the result of this was that it has come out around three or four different shades of blue, ranging from almost-turquoise to almost-purple. This dye certainly makes a change from your standard blue, and isn't too flourescent either. I can't recommend it enough. -Miriam-