IGI Global: is a open access publisher?

Colours of Sheroa/Romeo are ambiguous and not easy for researcher to understand if a publisher has a Open Access policy or not.
For example, the color of IGI Global is Blue, "Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF" and if we read the "General Conditions" says that "Publisher's version/PDF must be used"...
For a researcher this could be a Open Access publisher but not. They don't allow post-print, or pre print, and we need to pay APC "Article processing charge "...

The terms and definitions are not easy! We need to simplify this "taxonomy"!

» Glossary: Open Science in the Life Sciences