Henna (+Indigo) after Weave-- Is it Safe?

 I am currently in a weave, which I will take down next weekend and will need to dye my hair to match my next weave to be installed the next day for a wedding. 

As we all know, Traditional color is not the way to go here, so I want to go the natural route.  I have purchased Henna+Indigo and wanted to know if it will be safe to go through the two-step process just after takedown since my hair will only be out of a weave for a few hours at the time of application. 

I have done my research, and nothing suggests that its not safe, but I wanted to check in to see if any of you ladies have done this?  I would think it would actually beneficial, given that Henna has great conditioning properties, but Please let me know!