Gold Open Access refers to Unrestricted and immediate online access to the full content of a scholarly journal via a publisher's website. This model usually requires an Article Processing Charge (APC) paid by the author or their institution.
Green Open Access refers to “self-archiving” your publications in an open access repository, i.e. in addition to publication in traditional subscription journals, authors also deposit a copy of their articles into an institutional repository such as UNIZULU Institutional Repository.