This is a web style guide for the Open Access Journals Toolkit. This style guide is a set of rules and guidelines that should be followed when displaying information about the Toolkit. If any elements in the style guide are altered, they no longer represent the brand in the way they have been designed to. The live version of the Open Access Journals Toolkit is available at www.oajournals-toolkit.org. The Open Access Journals Toolkit is a freely accessible resource providing guidance and further reading materials to support new and established open access journals in navigating the rapidly changing landscape of open access publishing. The Open Access Journals Toolkit covers topics across the journal development lifecycle and everyday operation, such as journal creation, costs, staffing, policy development, through to indexing and key technical aspects. This work has been supported by the Open Access Scholarly Publishing Association (OASPA) and the Directory of Open Access Journals (DOAJ).