PERQ uses two unique font families: Lato and Rokkitt.
Lato should be used for all headers and sub-headers, with multiple options within that font family. Rokkit Bold Mixed Case is the only exception and can be used for subheaders as well.
Rokkit Light should be used for all body text and bulk content, with either Rokkit Medium or Rokkit Bold being used to highlight or call out specific words to give them emphasis. You go, Rokkit Bold.