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"!