Hi all!
i just wanted to share this:
in short using the new org 9.0 features one can easily add colors to headers, lines ,words etc with the new color: link types (the code is at the site to add the color: link type)
it works fantastically when exporting files and provides a great and easy way to add colors to you org-reveal slides!
thx so much to John for his awesome blog (and work :))!
Z