Anthropic design system

What font does Anthropic use?

Anthropic’s website uses Anthropic Serif for headings and Anthropic Sans for body text. Anthropic Serif is not on Google Fonts; the closest free match is Source Serif 4; Anthropic Sans is not on Google Fonts; the closest free match is Figtree.

Anthropic colour palette

Anthropic’s home page is light (#F0EEE6 background, #141413 text). Its palette: #F0EEE6, #141413, #FAF9F5, #E3DACC, #B0AEA5, #D97757.

• #F0EEE6
  48% · backgrounds
• #141413
  28% · backgrounds, text
• #FAF9F5
  14.3% · backgrounds
• #E3DACC
  8.1% · backgrounds
• #B0AEA5
  1.5% · text
• #D97757
  Negative
• #C6613F
  Warning

Type scale

Each size the page sets text in, with its weight and line height. Anthropic’s largest type is 60.87px at weight 700.

Spacing and shape

Spacing steps the page leans on: 4px, 8px, 12px, 16px, 24px, 28px, 32px, 76px, 100px.

Corner radii: 6px, 8px, 12px, 16px, 24px, pill. No shadows measured: the design is flat.

What makes Anthropic look like Anthropic

Almost entirely neutral: 100% of the page is painted in #F0EEE6 and #141413.

The largest type (60.87px Anthropic Sans) is bold (700).

Balanced: text covers 14% of the page.

Anthropic DESIGN.md for Claude Code, Cursor and Lovable

A DESIGN.md is the brief an AI coding tool reads before it writes UI. This one carries everything on this page as rules a model follows: the allowed colours and what each is for, the fonts with free stand-ins, the type scale, spacing, corners, and the things Anthropic’s design never does.

Put it in your project root and ask your tool to follow it: “Read DESIGN.md and build [your product] in this design language.” It describes a style, not Anthropic’s product, so use your own name, words and images.

Download Anthropic DESIGN.md · View it as text

As CSS variables

The measured values as CSS custom properties, with free fonts standing in for licensed ones. Use them to learn from or to start a project in a similar style; Anthropic’s name, logo, words and images are theirs.

@import url("https://fonts.googleapis.com/css2?family=Figtree:wght@400;500;600;700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:wght@400;500;600&display=swap");
@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&display=swap");

:root {
  --color-background: #F0EEE6; /* Background */
  --color-surface: #FAF9F5; /* Surface */
  --color-text: #141413; /* Text */
  --color-negative: #D97757; /* Negative */
  --color-warning: #C6613F; /* Warning */
  --color-e3dacc: #E3DACC; /* 8.1% of the page, as fills */
  --font-body: "Anthropic Sans", "Figtree", sans-serif; /* Anthropic Sans on the site; Figtree renders */
  --font-display: "Anthropic Serif", "Source Serif 4", serif; /* Anthropic Serif on the site; Source Serif 4 renders */
  --font-code: "Anthropic Mono", "JetBrains Mono", monospace; /* Anthropic Mono on the site; JetBrains Mono renders */
  --type-display: 60.87px; /* Display, weight 700 */
  --type-display-leading: 66.9518px;
  --type-headline: 24px; /* Headline, weight 600 */
  --type-headline-leading: 31.2px;
  --type-title-large: 22.4px; /* Title Large, weight 400 */
  --type-title-large-leading: 31.36px;
  --type-title-medium: 20px; /* Title Medium, weight 400 */
  --type-title-medium-leading: 28px;
  --type-title-small: 18px; /* Title Small, weight 400 */
  --type-title-small-leading: 25.2px;
  --type-body-large: 16px; /* Body Large, weight 600 */
  --type-body-large-leading: 22.4px;
  --type-body-small: 15px; /* Body Small, weight 400 */
  --type-body-small-leading: 15px;
  --type-body-small-tracking: -0.005em;
  --type-label: 12px; /* Label, weight 400 */
  --type-label-leading: 16.8px;
  --type-label-tracking: -0.02em;
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-28: 28px;
  --space-32: 32px;
  --space-76: 76px;
  --space-100: 100px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-3xl: 24px;
  --radius-full: 9999px;
}

How this was measured

PikSpec’s scanner read the anthropic.com home page in Chrome at 1440px wide on 14 October 2026: the computed styles of its elements, the fonts that rendered and how much of the page each colour covers. Websites change; capture the page yourself with PikSpec for today’s values, any page, and exports in five formats.

Anthropic is a trademark of its owner. This page is an independent measurement and is not affiliated with or endorsed by Anthropic.

Similar light designs: Airbnb · Airtable · Allbirds · Apple · Arc · Asana

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