Prosody · brand system · v1.0

One anchor, four registers.

One variable font — Roboto Flex — and four ways of speaking, all derived from a single anchor. Every deformation answers to a rule of the trade: width is duration, weight is projection, grade is articulation. Nothing is decorative.

The four registers

Clarté

Documentation · interface · help

One voice, in thirty languages

The register of long reading. Opened by width and optical size, never by thinness: it is the text people read most, so it must be the most comfortable.

wght 400 · wdth 128 · GRAD −20 · opsz 72 · slnt 0 — leading 1.62

Confidence

Editorial · research · long form

One voice, in thirty languages

Tightened, narrow column, small optical size. Intimacy comes from density, not italics — the slant stays at −3, enough to be felt, too little to tire.

wght 355 · wdth 82 · GRAD −45 · opsz 16 · slnt −3 — leading 1.42

Gravité

Enterprise · security · commitment

One voice, in thirty languages

Dense and compact. The weight comes from boldness; grade only confirms it. Narrowness grounds it and keeps it apart from Éclat.

wght 700 · wdth 92 · GRAD 120 · opsz 30 · slnt 0 — leading 1.34

Éclat

Launch · campaign · event

One voice, in thirty languages

Deployed, projected, sharp. Tight leading and wide negative tracking: it occupies space instead of filling it. The register of large format.

wght 760 · wdth 140 · GRAD 20 · opsz 110 · slnt −5 — leading 1.18

Floor rule

Below --t-2xs (12.8 px), the four registers become indistinguishable. The system falls back to Clarté, leading 1.5, tracking +0.01em. A system that says where it stops is more credible than one that claims to cover everything.

The anchor and the bounds

Weight 355 → 760 · Width 82 → 140 · Grade −45 → 120 · Slant −5 → 0. No use leaves these ranges. The anchor — 460 / 104 / 0 / 48 / 0 — never moves: it is the favicon, the footer, the business card. The four registers derive from it; they do not replace it.

The band is a notation, not a register

The rythmo band keeps its own block of tokens: width 72 → 151 around a base of 104, weight 480, optical size 60, green in / red out to a tenth of a frame. Its bounds are the notation's, not the brand text's: stretched text is a held sound, tightened text is a fast delivery, and the width offsets of one loop cancel out exactly.

See the notation, live

The Japanese rule

An ideogram has a fixed width; distorting it is a fault. Duration is carried by aki — the spacing adjustment of Japanese typography — together with size and weight. Never the glyph.

What the system refuses

No waveforms. Not as a logo, not as a background, not as an icon: the band replaces them everywhere.
No purple, no neon, no dark gradients.
No disruption vocabulary: revolution, game-changer.
No variable axis without a reason from the trade.
No stock faces.
No glyph distortion in Japanese: aki, size, weight only.

Ink & paper

Paper

--paper

Raised

--paper-raised

Sunken

--paper-sunken

Ink

--ink

Muted ink

--ink-muted

Faint ink

--ink-faint

Rule

--rule

Signal

--mark

Signal pressed

--mark-sunken

Sync in

--sync-in

Inverse paper

--paper-inverse

Type scale · ratio 1.25

--t-3xsProsody

--t-2xsProsody

--t-xsProsody

--t-smProsody

--t-mdProsody

--t-lgProsody

--t-xlProsody

--t-2xlProsody

--t-3xlProsody

--t-4xlProsody

Every value on this page is read live from tokens.css — the single source of truth, imported as-is by the site, the band and this page.