Quark is the new default theme for Grav CMS. This theme is built with the Spectre.css framework and provides a powerful base for developing your own themes. Quark uses functionality that is only available in Grav 1.4+, as such you cannot run Quark on earlier versions of Grav. Installing the Quark theme can be done in one of two ways. Our GPM (Grav Package Manager) installation method enables you to quickly and easily install the theme with a simple terminal command, while the manual method enables you to do so via a zip file.