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linear.app vs perplexity.ai

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

linear.app
linear.app· 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.

linear.app

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.

linear.app

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.

linear.app

h2

72px · 510 · shown smaller

h1

64px · 510 · shown smaller

h2

48px · 510 · shown smaller

h1

48px · 590 · shown smaller

h1

40px · 510 · shown smaller

h3

24px · 590

h3

20px · 590

perplexity.ai

body

16px · 400

Corners

Drawn at the measured radii.

linear.app

4px

pill

6px

12px

8px

pill

perplexity.ai

pill

6px

11px

8px

12px

4px

Spacing

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

linear.app

4
8
12
16
20
24
32
40

perplexity.ai

4
8
12
16
32
92

Depth

Shadows cast on each side's own ground.

linear.app

sm

md

perplexity.ai

sm

md

lg

Buttons

Rendered from the measured computed styles.

linear.app

default

perplexity.ai

default

The measured values behind the panels above.

linear.appperplexity.ai

At a glance

CornersPillPill
Display size — these differ72px16px
Spacing base4px4px
Accent colours — these differ27
Type families — these differ21
Components — these differ54

Full palette

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

All colours — these differ#62666D#08090A#0F1011#0003#0009#0000#F91880#00BA7C#F7F8F8#8A8F98#FFFFFF#D0D6E0#3E3E44#000000#E5E5E6#18191A#271A00#0000#27251E#FFF0#016A71#A23544#DC6973#97431A#000000#D6D5D4#FDFBFA#FFFFFF#539E55#E10600
Semantic — these differ—Success #539E55Error/Danger #E10600

Typography

Families — these differInter VariableBerkeley MonopplxSans
h164px · 510 · 64px · Inter Variable—
h248px · 510 · 48px · Inter Variable—
h324px · 590 · 31.92px · Inter Variable—
span16px · 400 · 24px · Inter Variable—
h416px · 590 · 24px · Inter Variable—
body — these differ15px · 400 · 24px · Inter Variable16px · 400 · 24px · pplxSans
link14px · 510 · 21px · Inter Variable—
label14px · 400 · 21px · Inter Variable—
code14px · 400 · 21px · Berkeley Mono—
input13.3333px · 400 · normal · Inter Variable—
button13px · 400 · 19.5px · Inter Variable—

Shape and rhythm

Radius — these differ4px6px8px12px9999px4px6px8px11px12px9999px
Spacing — these differ4px8px12px16px20px24px32px40px48px56px76px96px4px8px12px16px32px92px
Border widths1px1px

Depth

Strategy——
Shadows — these differrgba(0, 0, 0, 0.4) 0px 1px 0px 0pxrgba(255, 255, 255, 0.03) 0px 0px 0px 1px inset, rgba(255, 255, 255, 0.04) 0px 1px 0px 0px inset, rgba(0, 0, 0, 0.6) 0px 0px 0px 1px, rgba(0, 0, 0, 0.1) 0px 4px 4px 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 differ0.300.600.400.700.800.900.700.20
Z-index — these differbase 1base 2base 3dropdown 50sticky 100sticky 995sticky 996sticky 997base 1dropdown 10dropdown 20dropdown 30sticky 500

Components

Sharedbuttoncardnavigationlinkbuttoncardnavigationlink
Only here — these differinput—
Signature——

How this was measured

Differences here are ours, not the brands'.

Pages read6—
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.