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Clerk vs spectr.pm

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

Clerk: Clerk | Authentication and User Management · Above the fold
Clerk
clerk.com· read 2026-11-03
spectr.pm: Spectr - AI Product Ops: Meetings to PRDs, Specs & Stories · Above the fold
spectr.pm
spectr.pm· read 2026-10-14

Worth knowing

  • One side has no named colour roles, which means it predates role-based extraction. Re-generate it for a like-for-like 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.

Clerk

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.

spectr.pm

Heading on canvas

Body copy in the measured muted role.

Primary action
18.6:1 ink on canvas

Palette

Named roles first, then every colour measured without one.

Clerk

No named roles measured.

spectr.pm

  • canvas#0D0D0D
  • surface#171717
  • ink#FAFAFA
  • hairline#2E2E2E
  • primary#894DEF
  • on-primary#FAFAFA

10 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.

Clerk

No type measured.

spectr.pm

hero-display

288px · 900 · shown smaller

display

280px · 900 · shown smaller

display

252px · 900 · shown smaller

display

200px · 900 · shown smaller

display

132px · 800 · shown smaller

display

99px · 600 · shown smaller

h2

92px · 800 · shown smaller

Corners

Drawn at the measured radii.

Clerk

No radii measured.

spectr.pm

0px

Spacing

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

Clerk

No spacing measured.

spectr.pm

4
8
12
16
24
28
32
40

Depth

Shadows cast on each side's own ground.

Clerk

No shadows measured.

spectr.pm

sm

Buttons

Rendered from the measured computed styles.

Clerk

No buttons measured.

spectr.pm

primaryfilledprimary-smtext

The measured values behind the panels above.

Clerkspectr.pm

At a glance

Ground—Dark
Corners—Sharp
Display size—288px
Spacing base—4px
Accent colours — these differ08
Type families — these differ02
Ink on canvas—18.6:1
Components — these differ011

Colour roles

primary—#894DEF
canvas—#0D0D0D
surface—#171717
ink—#FAFAFA
body—#B8B8B8
hairline—#2E2E2E
on-primary—#FAFAFA

Full palette

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

All colours — these differ—#894DEF#A273F2#14532D#78350F#166534#4ADE80#92400E#FBBF24#0D0D0D#171717#FAFAFA#B8B8B8#2E2E2E#6B6B6B#000000#262626
Semantic——

Typography

Families — these differ—Inter-e4c28016845df4efJetBrains Mono-33799697913f1f09
hero-display—288px · 900 · 288px · -11.52px · uppercase · Inter-e4c28016845df4ef
display—132px · 800 · 198px · -2.64px · Inter-e4c28016845df4ef
h1—72px · 800 · 72px · -2.52px · Inter-e4c28016845df4ef
h2—44px · 800 · 46.2px · -1.32px · Inter-e4c28016845df4ef
h3—19px · 600 · 28.5px · 0px · Inter-e4c28016845df4ef
heading—16px · 600 · 24px · 0px · Inter-e4c28016845df4ef
list-item—16px · 500 · 24px · 0px · Inter-e4c28016845df4ef
body—15px · 500 · 23.25px · 0px · Inter-e4c28016845df4ef
button—15px · 600 · 22.5px · 0px · Inter-e4c28016845df4ef
link—14px · 500 · 20px · 0px · Inter-e4c28016845df4ef
code—13px · 600 · 19.5px · 1.82px · uppercase · JetBrains Mono-33799697913f1f09
caption—12px · 500 · 16.5px · 0px · Inter-e4c28016845df4ef

Shape and rhythm

Radius — these differ—0px
Spacing — these differ—4px8px12px16px24px28px32px40px44px48px64px144px
Border widths — these differ—1px

Depth

Strategy—single-tier
Shadows — these differ—rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.1) 0px 10px 15px -3px, rgba(0, 0, 0, 0.1) 0px 4px 6px -4px
Gradients——
Opacity — these differ—1.000.700.900.940.650.36
Z-index — these differ—dropdown 10dropdown 50

Components

Shared——
Only here — these differ—button-primarybutton-filledbutton-primary-smbutton-textbutton-text-2cardcard-lgnavigationfooterlinklink-sm
Signature——

Interaction states

Read from each site's own stylesheets. An empty side means they were cross-origin and unreadable.

Measured — these differ—other:focus-visibleinput:hoverother:hovercard:hoverother:focusother:disablednav:hovernav:focus-visible

Responsive

Breakpoints — these differ—375→343px · 6col768→704px · 3col1024→960px · 5col1280→1216px · 5col1440→1376px · 5col

Themes

Measured on the live site, not derived.

Support—Single theme

How this was measured

Differences here are ours, not the brands'.

Pages read—6
Extracted — these differ2026-11-032026-10-14
Stylesheets—Readable
Roles unassigned—10

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