Kim's gray hair covered with a henna and indigo mix
The mix I used was about 50 grams of henna leftover from a previous henna hair dye, which I had frozen. It was originally mixed with a mildly acidic liquid to make a very think paste, left overnight until I saw dye release, and then thinned with more juice. I simply thawed it this time) and applied it to my hair. After wrapping in plastic wrap and then a towel, I left it on for 4.5 hours.
This is a picture of my gray roots after my second, half henna and half indigo. This is just what I wanted, a cool brownish-red!
On the darker parts of my hair I got a dark auburn / dark ash brown depending on the lighting. On the gray roots I have streaks of a light copper/brown color.