AssemblyAI — decoded design system

assemblyai.com · light · modern · tailwind · deep decode — measured live

AssemblyAI'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/assemblyai.com.

Decoded design system

AssemblyAI's decoded design system: background #FDFCF8, text #4A4945, accent #3923C7, link #3923C7, primary #3923C7; type scale h1 72px / h2 64px / body 16px; 8px spacing base; 0px base radius. The single interactive/action color is #3923C7 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #3923C7 — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, link, button_bg are all #3923C7 — one role, not several (the action color).
• accent #3923C7 — 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.

Typography

• Heading: Georgia
• Body: Georgia
• Mono: Modern Gothic Mono
• h1: 72px
• h2: 64px
• body: 16px

Spacing

• base unit: 8px
• scale: 4px, 8px, 10px, 12px, 16px, 24px, 30px, 32px, 48px, 80px

Radii

• base: 0px
• button: 2px

Shadows (elevation)

• card: rgba(0, 0, 0, 0.2) 0px 0px 18px 0px

Motion

Micro-interactions run at 150ms (dominant) with cubic-bezier(0.4, 0, 0.2, 1).

• durations: 150ms · 200ms · 500ms
• easings: cubic-bezier(0.4, 0, 0.2, 1) · ease
• animated properties: color, outline-color, background-color, border-color

Native design tokens

…and 87 more measured on the page.

Button states (measured)

• primary hover: background #887BDD
• primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

• container max-width: 1440px
• common grid: 2 columns

Motion choreography (measured)

Load order: div.flex → div.onetrust-pc-dark-filter

Scroll reveal: 2 elements rest at opacity 0, animate in over 0.5s cubic-bezier(0.4, 0, 0.2, 1).

Overlay recipe (measured)

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

Responsive (measured)

• breakpoints: 425px · 550px · 600px · 640px · 768px · 896px
• mobile (390px): hero 40px · nav hamburger

Install it

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

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

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

Export: DESIGN.md

# AssemblyAI — Design System

> light, modern, medium, tailwind — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#FDFCF8` |
| surface | `#F2F1ED` |
| border | `#E2E1DD` |
| text | `#4A4945` |
| text_muted | `#8E8D89` |
| primary | `#3923C7` |
| accent | `#3923C7` |
| link | `#3923C7` |
| button_bg | `#3923C7` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#3923C7` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `accent`, `link`, `button_bg` are all `#3923C7` — one role, not several (your action color).
- **accent** `#3923C7` — 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.
- **Page coverage** (full-page screenshot pixels): `#7E7D7B` 76.4% · `#FFFFFF` 15.5% · `#54546C` 6.5% · `#98999B` 1.5%

## Typography

- Heading: **Georgia**
- Body: **Georgia**
- Mono: **Modern Gothic Mono**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 72px / 400 · lh 72px · tracking -3.6px |
| h2 | 64px / 400 · lh 64px · tracking -3.2px |
| h3 | 56px / 400 · lh 56px · tracking -2.8px |
| body | 16px / 400 · lh 21px |
| small | 14px / 400 · lh 18px |
| eyebrow | 12px / 400 · tracking 1.2px |

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

> **Fonts —** Georgia — system font, no web load needed.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 4px, 8px, 10px, 12px, 16px, 24px, 30px, 32px, 48px, 80px — snap all gaps/padding to these
- section rhythm: 80px top/bottom padding per section (measured)

## Radius
- base: 0px
- button: 2px
- card: 4px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#3923C7` / `#FFFFFF` | none | 2px | 8px 12px 8px 12px | 400 12px / 1.2px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#3923C7` | 1px solid rgb(57, 35, 199) | 2px | 8px 12px 8px 12px | 400 12px / 1.2px | none |

**States (measured, not guessed)**

- primary hover: background `#887BDD`
- primary focus: outline `1px auto rgb(16, 16, 16)`
- transition: `background-color 0.2s ease`

## Shadows (elevation)
- card: `rgba(0, 0, 0, 0.2) 0px 0px 18px 0px`

## Motion
- durations: 150ms (dominant) · 200ms · 500ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant) · `ease`
- animated properties: color, outline-color, background-color, border-color

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 |
|-------|-------|
| `--color-black-500` | `#1d1b16` |
| `--color-neutral-300` | `#c7c3b2` |
| `--color-cobolt-500` | `#3923c7` |
| `--color-green-100` | `#cee0d4` |
| `--color-neutral-200` | `#dad7cb` |
| `--color-green-500` | `#01762f` |
| `--color-white` | `#fff` |
| `--color-blush-300` | `#ec9d92` |
| `--color-black-300` | `#777673` |
| `--color-gray-100` | `oklch(96.7% .003 264.542)` |
| `--color-black-400` | `#4a4945` |
| `--color-page-bg` | `#fdfcf8` |

_…and 85 more measured on the page._

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

## Layout (measured)
- container max 1440px · common grid: 2-col
- nav: 0px

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 114 | 424 | 2 | 29 | 0/0 | 71/29 |
| 538 | 361 | — | — | 0/0 | — |
| 899 | 409 | — | — | 0/0 | — |
| 1308 | 2059 | — | — | 0/0 | — |
| 3367 | 2160 | 2 | 120 | 0/0 | 43/57 |

## Motion choreography (measured)
Load order: `div.flex` @0ms → `div.onetrust-pc-dark-filter` @305ms
- scroll reveal: 2 elements rest at opacity 0, animate in over 0.5s cubic-bezier(0.4, 0, 0.2, 1) (0 revealed during the drive).
- 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)
- card ×6: pad 48px 32px 48px 32px · r 0px · bg #1D1B16
  - hover: font-weight `400` · letter-spacing `normal` · outline `1px solid rgb(136, 123, 221)`
- link: #3923C7 · no underline — hover #FFFFFF

## Responsive (measured)
- breakpoints: 425px · 550px · 600px · 640px · 768px · 896px
- mobile (390px): hero 40px · body 16px · nav: hamburger

## 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.

← All decoded design systems

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