My cousin tried NI the last couple times and noticed it faded very quickly. If you want a gentle haircolor, you might look at RC Color. Just choose a color about 2-3 shades lighter to start as it could go dark.

SF Bay Area, CA * "The Angel-Goddess-Guru of Haircoloring"
3b/c/a mix. medium texture, low porosity
My Motto: Strand Test! some hair pics
-- gone, but never forgotten.