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Extracted · 10 sections · 11 colors · grade C

anthropic.com

Accent #5e6ad2 · Anthropic Serif — chaque valeur ci-dessous est mesurée via getComputedStyle(), jamais affirmée à la main.

colors

faces

shadows

keyframes

Get DESIGN.md tokens.json Repeindre ce design

rendu réel · source de vérité

anthropic.com is built on a warm, off-white canvas (rgb(250, 249, 245)). The system uses rgb(20, 20, 19) as a near-neutral accent (low saturation). Sharp 0px corners on CTAs — architectural restraint, engineering precision alongside editorial serif type (Anthropic Serif) — voice of authority. Anthropic Serif is paired with Anthropic Sans for secondary roles. A restrained elevation system (1 distinct shadow) — shadows reserved for the few elements that must lift off the page. Motion is a first-class concern — 5 keyframe animations plus transition-driven interactions.

Color — roles, semantics & the full census

11 colors measured · click any swatch to copy

Canvas

#faf9f5

AAA 17.5:1

Ink

#141413

AAA 17.5:1

Accent

#141413

AAA 17.5:1

Line

#141413

AAA 17.5:1

Semantic states

No semantic state colors detected — this system signals state through weight & motion, not hue.

11 colors mined from the live renderexpand

Type — the ladder, in the real face

6 roles · rendered live in the real Inter (captured woff2) · lines are editable, click any spec to copy

display xl

display-xl68.3429px · 400

display md

display-md24px · 600 · ×2.85

body

body20px · 400 · ×1.20

body sm

body-sm18px · 600 · ×1.11

caption

caption16px · 500 · ×1.13

button

button16px · 400 · ×1.00

Spacing & radius, made spatial

9 spacing steps · 7 radii · bars are exact px widths

Spacing scale

xxs · 2px

xs · 4px

sm · 8px

md · 12px

base · 16px

lg · 24px

xl · 32px

2xl · 48px

3xl · 64px

Radius

none
0px

xs
8px

sm
16px

md
24px

lg
1600px

xl
1608px

full
1600px

Depth — elevation is extracted, not invented

1 box-shadows measured on the live page · click a tile to copy its raw value

shadow-1

Motion — easings, transitions & live keyframes

0 easing curves · 5 keyframes · hover a tile to preview

5 keyframe animations extracted

spin

marquee

fadein

menuOpen

menuClose

Components — the closed vocabulary

10 component families · 44 variants counted on the live DOM

Component	Variants found
buttons	×10
cta Banner	×9
nav Links	×6
links	×6
heading H3	×4
heading H2	×3
footer Links	×2
eyebrow Labels	×2
badges	×1
heading H1	×1

Component style specs (§4)expand

Buttons

Ghost

Background: transparent
Text: #141413 {colors.hairline}
Padding: 22.4px 12px
Radius: 0px
Font: 20px weight 400
Use: Subtle action, toolbar, nav button

Ghost

Background: transparent
Text: #141413 {colors.hairline}
Padding: 0px 0px 0px 12px
Radius: 0px
Font: 20px weight 400
Use: Subtle action, toolbar, nav button

Dark / Solid

Background: #141413 {colors.hairline}
Text: #faf9f5 {colors.background}
Padding: 8px 16px
Radius: 8px 0px 0px 8px
Border: 1px solid rgb(20, 20, 19)
Font: 16px weight 400
Use: Solid dark CTA

Dark / Solid

Background: #141413 {colors.hairline}
Text: #faf9f5 {colors.background}
Padding: 8px 16px
Radius: 8px
Border: 1px solid rgb(20, 20, 19)
Font: 16px weight 400
Use: Solid dark CTA

Pill

Background: transparent
Text: #141413 {colors.hairline}
Padding: 0px
Radius: 8px
Font: 16px weight 400
Use: Status pills, tags, chips

Light / Invert

Background: #faf9f5 {colors.background}
Text: #141413 {colors.hairline}
Padding: 12px 31.4776px
Radius: 0px 0px 8px 8px
Font: 18px weight 600
Use: Bright CTA on dark sections

Layout — structure & dimensions

4 layout metrics measured

max Widthmin(89.5rem, 100vw)

header Height68px

sidebar Width0px

container Padding0px

Responsive — real breakpoints

5 media-query stops read from the live CSS

479px

501px

767px

768px

991px

Do's & Don'ts

19 enforceable rules pulled verbatim from the spec

Use Off-White (`#faf9f5`) as the page background — it's intentionally not pure white

Use Near-Black (`#141413`) for text — not pure black, it's warmer and more readable

Use Anthropic Serif as the primary typeface — it defines the brand personality

Use the extracted shadow patterns for elevation — they are tuned to match the brand palette

Use full-pill radius (9999px) only for specific elements (avatars, pills, toggles)

Use Near-Black (`#141413`) as the primary accent — it's the brand's signature interactive color

Use 8px 0px 0px 8px border-radius on buttons — the standard corner rounding for interactive elements

Maintain nav height at 68px — consistent vertical space for the navigation bar

Respect the 4px–32px spacing range — the design uses a wide scale for visual breathing room

Use a 7-column grid on desktop — density matters for this content type

Don't

Don't use pure white (`#ffffff`) as a page background — the warm tone is part of the brand identity

Don't use pure black (`#000000`) for text — the near-black adds warmth

Don't substitute with generic sans-serif or serif — the custom font carries the brand

Don't invent new shadow values — use only the extracted shadow levels

Don't apply pill radius on rectangular buttons or cards — it's reserved for specific interactive elements

Don't introduce additional saturated accent colors — the palette is intentionally controlled

Don't collapse or hide the nav on scroll without an explicit scroll-triggered animation — the design uses fixed nav presence

Don't make the nav sticky — this design lets it scroll away to maximize content focus

Don't put a CTA button in the nav — this design uses links only at the top

Agent guide & export

Paste-ready prompt + the real files behind this page

Build a UI in the anthropic.com design system. Canvas #faf9f5 · ink #141413 · accent #141413. Type: Anthropic Serif — respect the size/weight ladder in §3. Radius, spacing, shadow: use only the extracted scales (no magic numbers). Full spec follows — paste the DESIGN.md below into your agent.

Every value above was getComputedStyle-verified.

$ npx prismd add anthropic

DESIGN.md · narrative spec tokens.json