I am so not brave enough to dye a Didy either. I had the natural one forever, and I was going to dye it, but then I chickened out and look at how fabulous it turned out in Lexi's hands! I wouldn't dare dye my silver waves, it is too gorgeous as it is. I recently got a neutral Girasol, tho, I might try with that one.
A green and black indio sounds awesome, tho, Mari, if you go for it be sure to post pics.