Not surprisingly, some people think that it is Vardana or Vecta Bold. But no… the font used in FB logo is called Klavika. However, minor changes have been made to the original font to give it a signature logo look. These changes are so minor that it can be safely said that Facebook logo uses 95% of Klavika. Klavika font was created in 2004 by Process Type Foundry, a typeface production company founded by the graphic designer named Eric Olson. Mark Zukerberg, founder of Facebook, in 2005, approached a design making firm named Cuban Council and asked them to make a logo for Facebook. Then Cuban Council’s designers used Klavika to create Facebook logo. But they made minor, however important, changes in Klavika to give the logo it’s distinctive look. On their website, the Cuban Council writes: But they don’t mention Erix Olson’s name! The website also says that, “the Twitter logo was in fact ALSO conceived in the Cuban Council offices, though not by us, but by Linda Leow, back then associated with Future Farmers.” Joe Kral of Test Pilot Collective helped us out in creating this rock solid identity, which Peter Markatos later helped refine and extend to business cards and letterhead. Cuban Council made the logo and Mark Zuckerberg used white colored version of this logo on the Facebook Blue (close to #405D9A). Why Zuckerberg chose to paint Facebook in blue color also has an interesting story behind it. The reason is that Mark Zuckerberg is colorblind and blue is the color that he can see best (with least change from the real color). That is why he chose the now famous, Facebook Blue color. Well, this is the story behind Facebook’s logo and the name of font they used in it. Do let me know if you any questions or comments.