Is your WASH shampoo bar color-safe for hair that has been dyed with bright red/copper henna?

We are not sure is the honest answer.  Henna works differently than Professional color.  The little experience that we have with Henna (on ourselves and clients) is that nothing gets it out, not even bleach!  So the true test is if you see any color in the foam while washing. Let us know if you are brave enough to try. Now we are curious.