What is the ratio of henna to indigo when the two are combined?

the ratio depends on the color you are trying to achieve. my natural color is a very dark brown and i wanted to cover the greys but not have them red from henna alone. i started out using a 50:50 ratio and then kept experimenting with ratios. i get my best, natural dark brown when i use a 30:70 ratio of henna:indigo.

Depends on whether you're trying to tone down the red from the henna or eliminate it entirely. There is a great FREE e-book that tells you everything you need to know about henna. I believe the website is mehandi.com. The author did her graduate thesis on Jenna.

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Last relaxer April 2011
BC 10/15/11

Thank you for the responses. I am going to henna/indigo this weekend. I will let you know the results.

I did the Henna and Indigo process this weekend and I LOVE it. I henna first, left in overnight, and did indigo this morning. I left the indigo in for 40 minutes. Results....deep black mahogany, grey coverage, curls thick, glossy and bouncy.

No Sun-in over indigo! You'll risk going green if you try.

I'm guessing you did just indigo over your henna? That's a good way to go black. A mixture of henna + indigo together goes more brownish. How long did you wait after hennaing? Henna tends to be orange when it's brand-new, but calms down to a more brownish red after a few days.

Personally, I'd suggest letting it sit for a little while. Indigo's pretty notorious for washing out over time (but not for everyone). And in the future, use a henna/indigo blend on your roots if you want to stay that darker color.

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I have been coloring my greys this way for over a year. I use 50/50 henna/indigo with 25 grams of amla and a dash of salt. This makes my grey a cool dark brown and the rest of my hair does not have the red tint.
No change in your curls with addition of AMLA