---
version: alpha
name: Anthropic
description: Light design system extracted from www.anthropic.com (DOM-true values, Emblematic extractor 0.2.0, 2026-11-12).
colors:
  on-surface: "#141413"
  background: "#FAF9F5"
  on-surface-variant: "#30302E"
  surface: "#E8E6DC"
  outline: "#3D3D3A"
  gray-600: "#5E5D59"
  gray-500: "#87867F"
  gray-1000: "#000000"
  gray-250: "#DEDCD1"
  gray-800: "#262624"
typography:
  display-lg:
    fontFamily: Anthropic Sans
    fontSize: 40.78px
    fontWeight: 600
    lineHeight: 1.25
    letterSpacing: -0.01em
  title-md:
    fontFamily: Anthropic Sans
    fontSize: 21.37px
    fontWeight: 700
    lineHeight: 1.25
  body-md:
    fontFamily: Anthropic Sans
    fontSize: 14.69px
    fontWeight: 400
    lineHeight: 1.5
  body-sm:
    fontFamily: Anthropic Sans
    fontSize: 13px
    fontWeight: 400
    lineHeight: 1.54
    letterSpacing: 0.01em
rounded:
  xs: 4px
  sm: 8px
  md: 10px
  lg: 16px
  full: 9999px
spacing:
  xxs: 2px
  xs: 4px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 24px
  2xl: 32px
  3xl: 48px
  4xl: 80px
  base: 8px
  container: 1280px
components:
  button-secondary:
    textColor: "{colors.outline}"
    rounded: "{rounded.full}"
    padding: 8px
    height: 28px
  card:
    backgroundColor: "#F5F4ED"
    rounded: "{rounded.xs}"
    padding: 0px
  input:
    backgroundColor: "#F5F4ED"
    rounded: "{rounded.sm}"
    padding: 0px
    height: 30px
---

# Anthropic

> Extracted from [https://www.anthropic.com/](https://www.anthropic.com/) on 2026-11-12 by Emblematic. Every value below was read from the rendered DOM (computed styles, `document.fonts`, and the fonts Chrome actually used to paint text), not estimated from pixels. When the YAML front matter and this prose disagree, the YAML wins. Copy values from this file exactly; don't transcribe them from memory. Don't copy logos, imagery, illustrations or marketing copy.

## Overview

Anthropic uses a light canvas (#FAF9F5) with a monochrome palette. Type is set in **Anthropic Sans**, **Anthropic Serif** (display), with 14.5px body text. Layout: 1280px container, top-sticky navigation, 4 sections. Built with next.js, sanity, cloudflare.

## Colors

Area-weighted from painted backgrounds, text and borders on the 1440px light capture. Roles are inferred from usage (largest background, most text, interactive fills). Every hex is an exact computed value; a role marked *unverified* is a best guess that has not passed review, so its canonical token (e.g. `primary`) is left out of the front matter.

| Token | Hex | OKLCH | Role | Share of paint | CSS variable |
|---|---|---|---|---|---|
| `on-surface` | `#141413` | 0.191 0.002 106.6 | text | 40.0% | `--theme-foreground-body` |
| `background` | `#FAF9F5` | 0.982 0.005 95.1 | bg | 53.7% | `--theme-background-primary` |
| `on-surface-variant` | `#30302E` | 0.308 0.004 106.6 | muted | 1.7% | `--theme-foreground-secondary` |
| `surface` | `#E8E6DC` | 0.924 0.014 97.5 | surface | 1.3% | `--theme-background-tertiary` |
| `outline` | `#3D3D3A` | 0.359 0.005 106.7 | border | 0.41% | `--color-gray-700` |
| `gray-600` | `#5E5D59` | 0.478 0.006 95.2 | other | 1.5% | `--color-gray-600` |
| `gray-500` | `#87867F` | 0.619 0.01 100.1 | other | 0.83% | `--color-gray-500` |
| `gray-1000` | `#000000` | 0 0 0 | other | 0.28% | `--color-gray-1000` |
| `gray-250` | `#DEDCD1` | 0.893 0.015 98.3 | other | 0.22% | `--color-gray-250` |
| `gray-800` | `#262624` | 0.268 0.004 106.6 | other | 0.04% | `--color-gray-800` |

Declared brand/accent tokens: `--color-clay-primary` = `#D97757` (declared, not painted on this page).

Contrast: text on background 17.5:1, muted text 12.55:1.

The site does not change under `prefers-color-scheme: dark`.

## Typography

| Family | Role | Weights | Share of text | Source |
|---|---|---|---|---|
| **Anthropic Sans** (CSS: `anthropicSans`) | body | 400, 600, 700 | 67.8% | webfont |
| **Anthropic Serif** (CSS: `anthropicSerif`) | display | 400 | 32.2% | webfont |

Declared in `@font-face` but not used to paint text on this page: Anthropic Mono, Jet Brains Mono, Lato. Don't treat these as the page's fonts.

Scale (px): 11, 13, 14.5, 16.5, 21.5, 41. Effective ratio ≈ 1.414 (close to a augmented fourth). Body 14.5px at line-height 1.5; display 40.78px with tracking -0.01em. Headings are sentence case. On a 390px viewport the body is 14px and display 25px.

## Layout

Spacing follows a 8px base unit; the most used steps are 2, 4, 8, 12, 16, 24, 32, 48, 80px. Sections open with about 97px of space before their first line of text. Content sits in a 1280px container on a 3-column grid. Text density 0.084 (text area / page area).

Section order (desktop). Kinds below the review threshold are shown as *section*:

1. **nav** (84px, bg #FAF9F5)
2. **hero** — “AI will have a vast impact on the world. Anthropic is a public benefit corporati” (1579px, bg #FAF9F5)
3. **section** — “Learn more” (698px, bg #FAF9F5)
4. **footer** — “Log in” (883px, bg #141413)

## Shapes

Dominant corner radius is a full pill; radii in use: 4px, 8px, 10px, 16px, pill. Borders: hairline (1px).

## Components

- **button-secondary**: textColor `#3D3D3A`, rounded `9999px`, padding `8px 12px`, height `28px`, fontFamily `Anthropic Sans`, fontSize `13px`, fontWeight `400`, border `1px solid #E8E6DC` (e.g. “Research”)
- **card**: rounded `4px`, padding `0px`, backgroundColor `#F5F4ED`
- **input**: rounded `8px`, height `30px`, padding `0px 16px`, backgroundColor `#F5F4ED`, border `1px solid #E8E6DC`

## Do's and Don'ts

- Do keep the palette monochrome; there is no chromatic brand accent on the page.
- Do set body copy in Anthropic Sans at 14.5px / 1.5.
- Do use Anthropic Serif only for display sizes, not for body text.
- Do tighten large headlines (-0.01em at 40.78px).
- Don't introduce font weights beyond 400, 600, 700.
- Don't add drop shadows; depth comes from tone and borders.
- Do keep corners at pill for most controls, and use the larger radii only for cards and media.
- Do snap spacing to multiples of 8px.
- Don't copy this site's logos, illustrations, photography or copy; use the system, not the brand assets.

## Provenance

Spec v2, extractor 0.2.0. Render quality: **ok**. Vision pass: not run. Fields below confidence 0.7 are hedged or left out above: `components`, `layout.columns`, `layout.hero`, `layout.section_count`, `space.section_padding_px`. Full per-field provenance is in `spec.json`.