Oh no belwillcoily
! That is pretty orange/coppery. I'm sorry it didn't work out the first time around.
First, fear not
. Henna gets deeper and less coppery the more you apply it.
Second, I've read good things on the Experiences with Henna
thread about the sift of Hesh alma and organic alma from hennasooq. If you order online, I'd call/email the seller and ask how finely sifted the powder is.
Third, I actually use my alma to directly affect dye release. Alma is acidic. So, where some folks mix henna with lemon juice etc, I just mix my henna with alma and water. I believe the alma sitting in the henna overnight is key.
Alma is a bit of a contradiction as it promotes dye release but mutes the intensity of the dye. Adding alma at the last minute is not
going to mute the henna much (if at all). It will still aid in maintaining your curl pattern, though.
Fourth, I think the ratio of henna/alma is fine. Let's assume you try letting the alma sit in the henna overnight. If the tea is acidic, you might want to try distilled water (or half tea half distilled water). You should be able to achieve that deeper mahogany color in ~3 applications over ~6 weeks.
Fifth, I didn't bother with indigo to achieve that color. I tried indigo twice, a couple years ago. Found I didn't care for the smell, it wore off quickly and I'd be left with a more firey henna color. So, I just switched to henna and alma instead. I understand you're using indigo as a temporary fix. I initially thought indigo would give me a brunette but found I liked the alma/henna mix better.