Our typeface is bold, simple, and universal — it is the common thread throughout our brand and allows us to emphasize the voices on Twitter.
For the @Username and #Hashtag lockups, we use Helvetica Neue Pro 75 Bold.
Helvetica Neue Pro 75 Bold
For Tweet Treatments, we use Helvetica Neue Pro 75 Bold for the name, the Tweet itself, and timestamp, and Helvetica Neue Pro 55 Roman for he @Username.
Helvetica Neue Pro 55 Roman