It's not exactly a hair question, but it kind of also is

I've been dyeing my naturally blonde eyebrows darker with indigo, henna and sometimes walnut husk powder, but I was wondering what I could use for my lashes. Everyone seems to discourage the use of these natural dyes for eyelashes as they can be irritant.

I've had my eyelashes (chemically) dyed before at a salon as well as with a home kit, and I can tell you you don't want that stuff in your eyes either...

Has anyone ever tried this using henndigo? Or is there maybe another alternative?