New Project: Organic Natural Hair Dye

I like dying my hair colors, especially not natural colors.
Not all of my hair usually just parts.
Most recently I dyed my hair completely bright purple last October and back to a more natural brown this January.
I have been missing having different colors in my hair.
Because I dye my hair colors that are not natural, I wanted to look into the possibility of dyes that are organic and can dye my hair rich colorful colors. Also the problem of the dyes with massive amounts of chemicals being damaging and carcinogenic has been worrying me so I wanted to look into organic dyes for that reason as well.
I have a friend who uses henna to dye her hair a brighter red and that gave me the idea to look into different shades using henna. I am also looking for more colorful dyes like crimsons and purples that are organic and less harmful.
I'm going to investigate the organic options and best brands and products.
Also, this as an excuse to get into some henna tattooing.

Initially I have found Indigo and henna can be used to dye hair and skin...I'm looking forward to being able to use and play around with indigo.
I will continue to research into it and post my findings.
Maybe even work into figuring out some of the chemistry behind it.

Extremely excited. ^_^