What is the font used in this document (Metropolis Doc)?

Question

The Metropolis Beamer theme uses Fira Sans by default, but I'm unsure whether its documentation is using the same font. When I try to load Fira Sans into my own documents, they do not look like that.

For reference, I'm attaching the desired and actual fonts below. I'm using \usepackage[sfdefault,lining]{FiraSans} in my document.

Metropolis

Mine

Answer 1

The source code is available with your TeX installation. The fonts in the theme are defined as:

  \iffontsavailable{Fira Sans Light,%
                    Fira Sans Light Italic,%
                    Fira Sans,%
                    Fira Sans Italic}%
  {%
    \setsansfont[ItalicFont={Fira Sans Light Italic},%
                 BoldFont={Fira Sans},%
                 BoldItalicFont={Fira Sans Italic}]%
                {Fira Sans Light}%
  }{%
    \iffontsavailable{Fira Sans Light OT,%
                      Fira Sans Light Italic OT,%
                      Fira Sans OT,%
                      Fira Sans Italic OT}%
    {%
      \setsansfont[ItalicFont={Fira Sans Light Italic OT},%
                   BoldFont={Fira Sans OT},%
                   BoldItalicFont={Fira Sans Italic OT}]%
                  {Fira Sans Light OT}%
    }{%
      \PackageWarning{beamerthememetropolis}{%
        Could not find Fira Sans fonts%
      }
    }
  }

And in the documents source it is nearly the same as:

  \iffontsavailable{Fira Sans Light,%
                Fira Sans Light Italic,%
                Fira Sans,%
                Fira Sans Italic}{%
    \setmainfont[BoldFont={Fira Sans}]{Fira Sans Light}%
  }{%
    \iffontsavailable{Fira Sans Light OT,%
                  Fira Sans Light Italic OT,%
                  Fira Sans OT,%
                  Fira Sans Italic OT}{%
      \setmainfont[BoldFont={Fira Sans OT}]{Fira Sans Light OT}%
    }{%
      \typeout{%
        Could not find Fira Sans fonts. Creating documentation%
        with standard fonts.%
      }
    }
  }
  \iffontsavailable{Fira Mono, Fira Mono Bold}{%
    \setmonofont{Fira Mono}%
  }{%
    \iffontsavailable{Fira Mono OT, Fira Mono Bold OT}{%
      \setmonofont{Fira Mono OT}%
    }{%
      \typeout{%
        Could not find Fira Sans fonts. Creating documentation%
        with standard monospaced fonts.%
      }
    }
  }
}{
  \typeout{%
    You need to compile with XeLaTeX or LuaLaTeX to use the Fira fonts.%
  }
}