Henna recipes for dying almost any hair colour with photographs of real subjects before and after, (follow link) I've never tried using henna before because I wasn't sure how it would turn out on my particular colour of hair. This gives me a better idea.
Another link from Mehandi.com to instructions on mixing and applying Ancient Sunrise's BAQ Henna for Hair. It also provides some more random henna info and was really what won me over when deciding if henna was right for me.
Cool Haircut for Thin Hair with Angled Layers This reminds me of the very first time I did anything like coloring to my hair and was the last until I was in my late 40's.I got a burgundy henna. I worked at Disney for many years and we were not allowed to do any coloring to our hair like dying, frosting etc.got busted by my boss, but I came up with an answer he had no choice but to accept. It toned down over time Would this color & cut look good on a 55yr. old?