Futura

Futura is a sans-serif font. It goes well with Proxima Nova, Playfair Display, Open Sans, Book Antiqua, Helvetica, Trade Gothic, Lato, Adelle, Tinos and Gotham. If you're thinking about using Futura then try 18px for headers. Give 17px a shot for content.

People commonly tag it as design, sans serif, serif, modern, elegant, classy, caps, retro, conference and portfolio. You can get it from Fonts.com, Fontspring, MyFonts and YouWorkForThem.