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Protocol

Racing DNA meets open-source philosophy. Saira's motorsport-inspired geometry powers through headlines, while Ubuntu's distinctive humanist forms — Canonical's signature typeface — make body text unmistakably modern.

technicaldistinctivedeveloper toolsLinuxopen source

Installation

$ pnpm dlx shadcn@latest add @fonttrio/protocol
Headingsans-serif

Saira

The quick brown fox

Bodysans-serif

Ubuntu

Jumps over the lazy dog and runs across the meadow

Monomonospace

IBM Plex Mono

const x = fn(42);

Try it with your text

Saira
Ubuntu
IBM Plex Mono
Building a Type System That Scales
Choose fonts that complement each other while serving distinct roles. The heading font sets the tone, the body font ensures readability, and the monospace font handles technical content.
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npx shadcn add @fonttrio/protocol
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Typography scale

LevelSizeWeightLH
h12.5rem7001.1
h22rem6001.15
h31.5rem6001.25
h41.25rem5001.35
body1rem4001.6
$ pnpm dlx shadcn@latest add @fonttrio/protocol
h1

Saira

h2

Saira

h3

Saira

h4

Saira

body

The quick brown fox jumps over the lazy dog. Good typography is invisible — great typography speaks before you read.

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