I absolutely LOVE this color! I've been trying to find the right shade of blue forever and this is exactly what I was looking for! It bleeds much less than other brands I've tried to. If you have naturally very dark hair like I do you will likely need to lighten first. I also leave this in for a few hours minimum as it will take better. Avoid washing your hair in hot water and cleaners containing sulfate. So far I've had this color for 3 weeks with very little fading. It also helps to add a few drops of dye to your regular conditioner.