Segment — decoded design system

segment.com · light · professional · custom · deep decode — measured live

Segment's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

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This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/decode/segment.com.

Decoded design system

Segment's decoded design system: background #FFFFFF, text #000D25, accent #1866EE, link #CACDD8, primary #191F36; type scale h1 48px / h2 40px / body 16px; 4px spacing base; 8px base radius. The single interactive/action color is #1866EE — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #1866EE — the single interactive color; only on things you click or must notice, never large fills.
• accent, secondary, button_bg are all #1866EE — one role, not several (the action color).
• accent #1866EE — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
• primary #191F36 — a brand color — but the call-to-action uses #1866EE, not this.
• link #CACDD8 — fails contrast on the background (~1.6:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).

Typography

• Heading: Whitney SSm
• Body: Whitney SSm
• h1: 48px
• h2: 40px
• body: 16px

Spacing

• base unit: 4px
• scale: 4px, 6px, 8px, 10px, 12px, 16px, 24px, 32px, 48px, 64px

Radii

• base: 8px
• button: 50px

Shadow

rgb(24, 102, 238) 0px 0px 0px 2px inset

Motion

Micro-interactions run at 300ms (dominant) with ease-in-out.

• durations: 300ms · 200ms · 150ms
• easings: ease-in-out
• animated properties: background-color, color, border-color, box-shadow

Native design tokens

…and 64 more measured on the page.

Button states (measured)

• primary hover: box-shadow rgb(14, 62, 146) 0px 0px 0px 2px inset · background #0E3E92
• primary focus: box-shadow rgb(11, 42, 96) 0px 0px 0px 2px inset · background #0B2A60 · outline 2px dotted rgb(11, 42, 96)

Layout (measured)

• container max-width: 1200px
• nav: 112px fixed
• common grid: 2 columns

Overlay recipe (measured)

dialog panel: rgba(0, 0, 0, 0) · radius 0px

Responsive (measured)

• breakpoints: 480px · 768px · 992px · 1344px · 1600px
• mobile (390px): hero 32px · nav inline

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/segment.com

registry item · or query it over MCP: get_design_system("Segment")

Export: DESIGN.md

# Segment — Design System

> light, professional, medium, custom — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#EFF0F1` |
| border | `#D8DADE` |
| text | `#000D25` |
| text_muted | `#606877` |
| primary | `#191F36` |
| accent | `#1866EE` |
| link | `#CACDD8` |
| secondary | `#1866EE` |
| button_bg | `#1866EE` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#1866EE` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `accent`, `secondary`, `button_bg` are all `#1866EE` — one role, not several (your action color).
- **accent** `#1866EE` — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
- **primary** `#191F36` — a brand color — but the call-to-action uses #1866EE, not this.
- **link** `#CACDD8` — fails contrast on the background (~1.6:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
- **Page coverage** (full-page screenshot pixels): `#000716` 42.5% · `#FFFFFF` 30.1% · `#8C8D90` 13.3% · `#E2E3E5` 7.3%

## Typography

- Heading: **Whitney SSm** _(free fallback: Newsreader)_
- Body: **Whitney SSm** _(free fallback: Newsreader)_

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 48px / 700 · lh 60px · tracking -1.44px |
| h2 | 40px / 700 · lh 52px · tracking -0.8px |
| h3 | 20px / 600 · lh 32px |
| body | 16px / 400 · lh 24px |
| small | 14px / 400 · lh 20px |

- Weight ladder: 400 · 500 · 600 · 700 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Whitney SSm may be proprietary — safe free fallback: Newsreader (Google Fonts).

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 4px, 6px, 8px, 10px, 12px, 16px, 24px, 32px, 48px, 64px — snap all gaps/padding to these
- section rhythm: 64px top/bottom padding per section (measured)

## Radius
- base: 8px
- button: 50px
- card: 50px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#1866EE` / `#FFFFFF` | none | 50px | 6px 24px 6px 24px | 500 16px | rgb(24, 102, 238) 0px 0px 0px 2px inset |
| secondary | `rgba(0, 0, 0, 0)` / `#1866EE` | none | 50px | 6px 24px 6px 24px | 500 16px | rgb(24, 102, 238) 0px 0px 0px 2px inset |

**States (measured, not guessed)**

- primary hover: box-shadow `rgb(14, 62, 146) 0px 0px 0px 2px inset` · background `#0E3E92`
- primary focus: box-shadow `rgb(11, 42, 96) 0px 0px 0px 2px inset` · background `#0B2A60` · outline `2px dotted rgb(11, 42, 96)`
- transition: `background-color 0.3s ease-in-out`

## Motion
- durations: 300ms (dominant) · 200ms · 150ms
- easings: `ease-in-out` (dominant)
- animated properties: background-color, color, border-color, box-shadow

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--radius-small` | `0.2rem` |
| `--radius-checkbox` | `0.2rem` |
| `--radius-base` | `0.4rem` |
| `--radius-large` | `1rem` |
| `--radius-extra-large` | `2rem` |
| `--radius-2x-large` | `5rem` |
| `--radius-circle` | `50%` |
| `--shadow-image` | `0 4px 16px 0 rgb(18 28 45/0.15)` |
| `--shadow-card` | `0 8px 24px 0 rgb(18 28 45/0.1)` |
| `--shadow-navigation` | `0 14px 25px 0 rgb(18 28 45/0.12)` |
| `--shadow-large` | `0 16px 60px 0 rgb(18 28 45/0.15)` |
| `--font-family-text` | `Whitney SSm,helvetica,arial,sans-serif` |

_…and 62 more measured on the page._

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1200px · common grid: 2-col
- nav: 112px fixed

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 111 | 604 | 2 | 48 | 64/64 | 60/40 |
| 715 | 316 | — | — | 0/32 | — |
| 1031 | 168 | — | — | 64/0 | — |
| 1303 | 876 | 2 | 48 | 0/32 | — |
| 2327 | 412 | 2 | 48 | 0/0 | — |

## Motion choreography (measured)
- overlay dialog (auto-opened): panel rgba(0, 0, 0, 0) · r 0px

Rebuild the timeline, not just the durations — order, delays and staggers above are the choreography.

## Components (measured)
- link: #FFFFFF · underline — hover #3ACEFA

## Responsive (measured)
- breakpoints: 480px · 768px · 992px · 1344px · 1600px
- mobile (390px): hero 32px · body 14px · nav: inline

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

An automated reading of Segment's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with segment.com. No screenshots stored. Removal requests: hello@mozaika.design.