Green vs Gold: Digging into Open Access Models

"The world of open access contains a colourful array of options for researchers who want to make their findings publicly accessible. Terms like green OA, gold OA, and even diamond or platinum OA are often used by publishers and funding agencies to describe different kinds of "open," but the distinctions can be confusing! What you need to know: 1. Green and Gold labels don't refer the the level of openness or the value of either model; they refer to the way articles are being made open:"