My first shot at Herbatint after years on Tints of Nature. My hair color is medium brown with very little grey. I went with 1N - Black but, after the full 40 minutes of having the product in my hair, and following all directions, I only ended up with a very dark brown, not black. Not sure why because the very many reviews state that you generally end up with a shade darker than expected. When viewed against the light, or in sunlight, my new dark brown has a nice reddish sheen to it, so it's so bad but, still, I wanted black... I intend to try again in a couple of weeks, same shade. As for the other aspects of this coloring - no irritation, nice shiny hair, and all my grey got covered. I hope it lasts for a while.