MozaikaDesign system

Claude — Design System

light · modern · medium · custom · confidence 92%

The full decoded design system for Claude: color roles, type scale, spacing, radii and paste-ready DESIGN.md / Tailwind / CSS exports.

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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/ds/claude.

Tokens

Claude's decoded design system: background #FAF9F5, text #141413, accent #141413, link #FF5F57, primary #C6613F; type scale h1 72px / h2 52px / body 23px; 4px spacing base; 6px base radius. The single interactive/action color is #141413 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#FAF9F5
surface#ECEBE7
border#D7D6D3
text#141413
text_muted#6B6B68
primary#C6613F
accent#141413
link#FF5F57
secondary#FEBC2E
button_bg#141413
button_text#FAF9F5

Using these colors

Typography

Spacing

Radii

Shadow

rgb(20, 20, 19) 0px 0px 0px 0px

Per-section tokens (7)

Export: DESIGN.md

# Claude — Design System

> light, modern, medium, custom

## Colors

| Role | Value |
|------|-------|
| bg | `#FAF9F5` |
| surface | `#ECEBE7` |
| border | `#D7D6D3` |
| text | `#141413` |
| text_muted | `#6B6B68` |
| primary | `#C6613F` |
| accent | `#141413` |
| link | `#FF5F57` |
| secondary | `#FEBC2E` |
| button_bg | `#141413` |
| button_text | `#FAF9F5` |

**Using these colors**

- **Action color** `#141413` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `accent`, `button_bg` are all `#141413` — one role, not several (your action color).
- **accent** `#141413` — 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** `#C6613F` — a brand color — but the call-to-action uses #141413, not this.
- **link** `#FF5F57` — fails contrast on the background (~2.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
- **secondary** `#FEBC2E` — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

## Typography

- Heading: **anthropicSerif** _(free fallback: Newsreader)_
- Body: **anthropicSans** _(free fallback: Newsreader)_
- h1: 72px
- h2: 52px
- body: 23px

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

## Spacing
- base unit: 4px
- scale: 2px, 4px, 6px, 8px, 12px, 16px, 24px, 32px

## Radius
- base: 6px
- button: 8px

## Primary button
- bg `#141413` · text `#FAF9F5` · radius 8px

## 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.

Export: Tailwind v4 (@theme)

@theme {
  /* action color #141413 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FAF9F5;
  --color-surface: #ECEBE7;
  --color-border: #D7D6D3;
  --color-text: #141413;
  --color-text-muted: #6B6B68;
  --color-primary: #C6613F;  /* a brand color — but the call-to-action uses #141413, not this. */
  --color-accent: #141413;  /* 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. */
  --color-link: #FF5F57;  /* fails contrast on the background (~2.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --color-secondary: #FEBC2E;  /* optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two. */
  --color-button-bg: #141413;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FAF9F5;
  /* fonts: anthropicSerif may be proprietary — safe free fallback: Newsreader (Google Fonts). anthropicSans may be proprietary — safe free fallback: Newsreader (Google Fonts). */
  --font-heading: "anthropicSerif", "Newsreader", Georgia, 'Times New Roman', serif;
  --font-body: "anthropicSans", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-h1: 72px;
  --text-h2: 52px;
  --text-body: 23px;
  --radius-base: 6px;
  --radius-button: 8px;
  --spacing-1: 2px;
  --spacing-2: 4px;
  --spacing-3: 6px;
  --spacing-4: 8px;
  --spacing-5: 12px;
  --spacing-6: 16px;
  --spacing-7: 24px;
  --spacing-8: 32px;
}

Export: CSS variables

:root {
  /* action color #141413 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FAF9F5;
  --surface: #ECEBE7;
  --border: #D7D6D3;
  --text: #141413;
  --text-muted: #6B6B68;
  --primary: #C6613F;  /* a brand color — but the call-to-action uses #141413, not this. */
  --accent: #141413;  /* 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. */
  --link: #FF5F57;  /* fails contrast on the background (~2.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --secondary: #FEBC2E;  /* optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two. */
  --button-bg: #141413;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FAF9F5;
  --font-heading: "anthropicSerif", "Newsreader", Georgia, 'Times New Roman', serif;
  --font-body: "anthropicSans", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --radius: 6px;
  --radius-button: 8px;
}
/* fonts: anthropicSerif may be proprietary — safe free fallback: Newsreader (Google Fonts). anthropicSans may be proprietary — safe free fallback: Newsreader (Google Fonts). */