I dyed my hair with Henna and it turned a sickly reddish brown. My friends hair went black with blue highlights.
Henna, when not mixed with chemicals, will turn the hair some shade of reddish-brown to bright red, depending on your natural hair color.For henna to dye the hair black, there had to have been some sort of man-made chemical additive, namely some form of black dye added to the powder to cause that result.
I wrote a whole hub on it. <link snipped - no promotional links>
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