This is a test theme for the Open EdX 'comprehesive' theming. It overrides just two standard open edx sass variables: it sets $sans-serif to 'Helvetica' and it makes the header bar on the main page green, as in "finally this works!"
Fore more details see the Open EdX Theme docs: https://github.com/edx/edx-platform/tree/named-release/dogwood.rc/themes