DesignMD
Discover
Discover

perplexity.ai vs railway.app

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

perplexity.ai
perplexity.ai· read 2026-08-09
railway.app
railway.app· 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.

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.

railway.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.

Palette

Named roles first, then every colour measured without one.

perplexity.ai

No named roles measured.

14 more, no measured role

railway.app

No named roles measured.

16 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.

perplexity.ai

body

16px · 400

railway.app

h1

56px · 500 · shown smaller

h1

54px · 500 · shown smaller

h2

40px · 500 · shown smaller

h2

36px · 400

h2

24px · 500

body

20px · 400

h3

20px · 600

Corners

Drawn at the measured radii.

perplexity.ai

pill

6px

11px

8px

12px

4px

railway.app

6px

pill

8px

Spacing

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

perplexity.ai

4
8
12
16
32
92

railway.app

4
8
12
16
24
32
40
48

Depth

Shadows cast on each side's own ground.

perplexity.ai

sm

md

lg

railway.app

sm

md

lg

xl

Buttons

Rendered from the measured computed styles.

perplexity.ai

default

railway.app

default

The measured values behind the panels above.

perplexity.airailway.app

At a glance

CornersPillPill
Display size — these differ16px56px
Spacing base4px4px
Accent colours — these differ72
Type families — these differ14
Components44

Full palette

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

All colours — these differ#271A00#0000#27251E#FFF0#016A71#A23544#DC6973#97431A#000000#D6D5D4#FDFBFA#FFFFFF#539E55#E10600#33323E#0000#13111C#6C6B7B#08070C#FFF0#545260#272530#FFFFFF#F7F7F8#000000#A1A0AB#DCDCE0#EBEBEB#E5E7EB#E7E5E3
Semantic — these differSuccess #539E55Error/Danger #E10600—

Typography

Families — these differpplxSansHelveticaInterIBM Plex Serifui-monospace
h1—56px · 500 · 70px · IBM Plex Serif
h2—40px · 500 · 50px · Inter
h3—20px · 600 · 27.5px · Inter
body — these differ16px · 400 · 24px · pplxSans20px · 400 · 28px · Inter
span—16px · 400 · 16px · Helvetica
link—16px · 400 · 26px · Inter
label—14px · 500 · 20px · Inter

Shape and rhythm

Radius — these differ4px6px8px11px12px9999px6px8px9999px
Spacing — these differ4px8px12px16px32px92px4px8px12px16px24px32px40px48px52px64px108px128px
Border widths1px1px

Depth

Strategy——
Shadows — these differrgba(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 4pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(255, 255, 255, 0.2) 0px 0px 0px 1.5px insetrgba(65, 78, 166, 0.1) 0px -12px 127px 0px, rgba(65, 78, 166, 0.07) 0px -4.38px 46.357px 0px, rgba(65, 78, 166, 0.06) 0px -2.127px 22.506px 0px, rgba(65, 78, 166, 0.04) 0px -1.042px 11.033px 0px, rgba(65, 78, 166, 0.03) 0px -0.412px 4.362px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(62, 45, 45, 0.24) 0px 100px 191px 0px, rgba(62, 45, 45, 0.165) 0px 36.5016px 69.7181px 0px, rgba(62, 45, 45, 0.133) 0px 17.7209px 33.8469px 0px, rgba(62, 45, 45, 0.106) 0px 8.6871px 16.5924px 0px, rgba(62, 45, 45, 0.075) 0px 3.43489px 6.56065px 0pxrgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(255, 255, 255, 0.1) 0px 0px 0px 1px inset
Gradients——
Opacity — these differ0.700.200.500.200.600.300.750.90
Z-index — these differbase 1dropdown 10dropdown 20dropdown 30sticky 500dropdown 10dropdown 20dropdown 50sticky 999modal 9999toast 2147483636toast 2147483638

Components

Sharedbuttonnavigationlinkbuttonnavigationlink
Only here — these differcardinput
Signature——

How this was measured

Differences here are ours, not the brands'.

Pages read—6
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.