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anthropic.com vs perplexity.ai

Two design systems side by side, measured from the live sites — colour, type, shape, depth, components, states and responsive behaviour.

anthropic.com
anthropic.com· read 2026-08-09
perplexity.ai
perplexity.ai· read 2026-08-09

Worth knowing

  • Neither side has named colour roles, so both predate role-based extraction. Re-generating either one fills in the palette comparison.
  • Interaction states are missing on at least one side — that site's stylesheets were cross-origin and could not be read.

Ground and ink

Each side painted in its own measured canvas, ink, muted and primary roles.

anthropic.com

No colour roles measured on this side, so there is no ground to paint. The palette below is still real; re-extracting the site fills this in.

perplexity.ai

No colour roles measured on this side, so there is no ground to paint. The palette below is still real; re-extracting the site fills this in.

Palette

Named roles first, then every colour measured without one.

anthropic.com

No named roles measured.

16 more, no measured role

perplexity.ai

No named roles measured.

14 more, no measured role

Type scale

Set at the measured size, weight, tracking and leading. Brand typefaces are not loaded, so the metrics are real and the letterforms are not.

anthropic.com

h1

104px · 300 · shown smaller

h1

61px · 700 · shown smaller

h2

61px · 400 · shown smaller

h3

24px · 600

body

24px · 400

list-item

20px · 400

link

18px · 600

perplexity.ai

body

16px · 400

Corners

Drawn at the measured radii.

anthropic.com

8px

8px

0px

perplexity.ai

pill

6px

11px

8px

12px

4px

Spacing

One shared scale across both sides, so the bars are directly comparable.

anthropic.com

4
8
12
16
20
24
32
48

perplexity.ai

4
8
12
16
32
92

Depth

Shadows cast on each side's own ground.

anthropic.com

sm

perplexity.ai

sm

md

lg

Buttons

Rendered from the measured computed styles.

anthropic.com

default

perplexity.ai

default

The measured values behind the panels above.

anthropic.comperplexity.ai

At a glance

Corners — these differSoftPill
Display size — these differ104px16px
Spacing base4px4px
Accent colours — these differ57
Type families — these differ41
Components — these differ34

Full palette

Every colour each extraction kept, including the ones with no measured role.

All colours — these differ#D97757#E3DACC#C6613F#788C5D#BCD1CA#6A9BCC#C46686#EBCECE#141413#FAF9F5#B0AEA5#000000#C6C4BA#87867F#0F0F0E#73726C#271A00#0000#27251E#FFF0#016A71#A23544#DC6973#97431A#000000#D6D5D4#FDFBFA#FFFFFF#539E55#E10600
Semantic — these differ—Success #539E55Error/Danger #E10600

Typography

Families — these differAnthropic SansAnthropic SerifanthropicSerifanthropicSanspplxSans
h160.8653px · 700 · 66.9518px · Anthropic Sans—
h260.8653px · 400 · 66.9518px · Anthropic Serif—
h324px · 600 · 31.2px · Anthropic Sans—
body — these differ24px · 400 · 33.6px · Anthropic Serif16px · 400 · 24px · pplxSans
list-item20px · 400 · 28px · Anthropic Serif—
link18px · 600 · 25.2px · Anthropic Serif—
span16px · 400 · 16px · Anthropic Sans—
h612px · 500 · 15px · Anthropic Sans—
label12px · 400 · 15px · Anthropic Sans—
small12px · 400 · 16.8px · anthropicSans—

Shape and rhythm

Radius — these differ0px 8px 8px 0px8px 0px 0px 8px8px4px6px8px11px12px9999px
Spacing — these differ4px8px12px16px20px24px32px48px60px64px76px180px4px8px12px16px32px92px
Border widths1px1px

Depth

Strategy——
Shadows — these differrgba(0, 0, 0, 0.01) 0px 2px 2px 0px, rgba(0, 0, 0, 0.02) 0px 4px 4px 0px, rgba(0, 0, 0, 0.04) 0px 16px 24px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.08) 0px 1px 2px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 0px 0px 1pxoklch(0.5525 0.085 207.66 / 0) 0px 0px 36px 4px
Gradients——
Opacity — these differ0.010.340.500.700.20
Z-index — these differbase 1base 2base 3base 5dropdown 10sticky 101modal 1000modal 9999base 1dropdown 10dropdown 20dropdown 30sticky 500

Components

Sharedbuttonnavigationlinkbuttonnavigationlink
Only here — these differ—card
Signature——

How this was measured

Differences here are ours, not the brands'.

Pages read2—
Extracted2026-08-092026-08-09
Stylesheets——
Roles unassigned——

Measured by DesignMD from the live sites. Compare two others. Generate a DESIGN.md for your own site.