[nyuks3]

Any advice for dying already dyed auburn hair with massive grey roots. I heard that using an ash color will diminish the brassiness.

[cedwick]

Unless you still want lots of grey, don't use ash! Do you want to cover grey? I am guessing you do. I would keep your nice auburn hue as a base, which is great for fall color, but just get your roots touched up with a matching color. Keep your base a little darker than what you would like and it should stay grey-free for longer. I recommend you see a stylist, to do that perfect base of auburn, or you can use a demi-perm if you cannot afford it, but do a good job. Then when you have faded to that perfect shade, I would some kind of gold highlights. This mights give you two different looks only within a month. My base was just dark brown, but from cool red highlights, it kind of faded to a light-medium coolish brown color, then I simply replaced the highlights I had for dark golden blonde. I have occasional grey, but gold is the best for concealing this. When it comes to avoiding grey, nothing comes close to beating Gold.

[PunkChic]

It depends how much grey hairs you have. Let's say for an instance you have 50% grey and 50& natural. You would need to mix two shades together to get the targeted result. So you would need to tubes of tint (both different shades) It is difficult to explain. But I definitely recommend you get it done at a salon. Doing it at home can create disastrous results. Lol.