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Loops vs spectr.pm

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

Loops: Loops | Email Platform for SaaS: Marketing & Transactional · Above the fold
Loops
loops.so· 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

Ground and ink

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

Loops

Heading on canvas

Body copy in the measured muted role.

Primary action
17.3:1 ink on canvas

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.

Loops

  • canvas#191918
  • surface#0E0B0C
  • ink#FDFDFC
  • muted#EEEEEC
  • hairline#3B3A37
  • primary#FDFDFC
  • on-primary#222222

5 more, no measured role

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.

Loops

h1

44px · 500 · shown smaller

h2

44px · 500 · shown smaller

display

44px · 500 · shown smaller

h1

40px · 500 · shown smaller

h1

36px · 600

heading

36px · 400

heading

34px · 400

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.

Loops

0px

12px

pill

8px

16px

6px

spectr.pm

0px

Spacing

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

Loops

4
8
12
16
20
24
32
36

spectr.pm

4
8
12
16
24
28
32
40

Depth

Shadows cast on each side's own ground.

Loops

sm

md

lg

xl

spectr.pm

sm

Buttons

Rendered from the measured computed styles.

Loops

primaryprimary-lg

spectr.pm

primaryfilledprimary-smtext

The measured values behind the panels above.

Loopsspectr.pm

At a glance

GroundDarkDark
Corners — these differPillSharp
Display size — these differ44px288px
Spacing base4px4px
Accent colours — these differ48
Type families — these differ92
Ink on canvas — these differ17.3:118.6:1
Components — these differ1411

Colour roles

primary — these differ#FDFDFC#894DEF
accent#9E9EFF—
link#0000EE—
canvas — these differ#191918#0D0D0D
surface — these differ#0E0B0C#171717
ink — these differ#FDFDFC#FAFAFA
body — these differ#FFF4EC#B8B8B8
muted#EEEEEC—
hairline — these differ#3B3A37#2E2E2E
on-primary — these differ#222222#FAFAFA

Full palette

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

All colours — these differ#FDFDFC#9E9EFF#0000EE#2D2725#78716C#FC7432#7D1B0C#191918#0E0B0C#FFF4EC#EEEEEC#E6E1DE#222222#3B3A37#B5B3AD#894DEF#A273F2#14532D#78350F#166534#4ADE80#92400E#FBBF24#0D0D0D#171717#FAFAFA#B8B8B8#2E2E2E#6B6B6B#000000#262626
Semantic——

Typography

Families — these differIntersans-serifGeorgiaui-sans-serifNewsreaderui-serifDidotui-monospaceNewsreader VariableInter-e4c28016845df4efJetBrains Mono-33799697913f1f09
hero-display—288px · 900 · 288px · -11.52px · uppercase · Inter-e4c28016845df4ef
display — these differ44px · 500 · 44px · -0.88px · Newsreader132px · 800 · 198px · -2.64px · Inter-e4c28016845df4ef
h1 — these differ36px · 600 · 40px · -0.9px · Inter72px · 800 · 72px · -2.52px · Inter-e4c28016845df4ef
h2 — these differ24px · 600 · 31.9999px · -0.6px · Inter44px · 800 · 46.2px · -1.32px · Inter-e4c28016845df4ef
heading — these differ18px · 400 · 22.5px · 0px · Inter16px · 600 · 24px · 0px · Inter-e4c28016845df4ef
nav-link16px · 500 · 24px · 0.16px · Inter—
code — these differ15.5px · 400 · 27.59px · 0px · ui-monospace13px · 600 · 19.5px · 1.82px · uppercase · JetBrains Mono-33799697913f1f09
h3 — these differ15px · 500 · 22px · -0.15px · Inter19px · 600 · 28.5px · 0px · Inter-e4c28016845df4ef
body — these differ14px · 400 · normal · 0px · Inter15px · 500 · 23.25px · 0px · Inter-e4c28016845df4ef
button — these differ14px · 500 · 20px · -0.14px · Inter15px · 600 · 22.5px · 0px · Inter-e4c28016845df4ef
input13px · 400 · 15.6px · 0px · Inter—
caption — these differ12px · 400 · 17.04px · 0px · Inter12px · 500 · 16.5px · 0px · Inter-e4c28016845df4ef
link — these differ12px · 400 · normal · 0px · Inter14px · 500 · 20px · 0px · Inter-e4c28016845df4ef
list-item — these differ12px · 400 · normal · 0px · Inter16px · 500 · 24px · 0px · Inter-e4c28016845df4ef

Shape and rhythm

Radius — these differ0px6px8px9px12px14px16px9999px0px
Spacing — these differ4px8px12px16px20px24px32px36px40px48px64px80px4px8px12px16px24px28px32px40px44px48px64px144px
Border widths — these differ1px2px1px

Depth

Strategy — these differlayered-microsingle-tier
Shadows — these differrgba(28, 25, 23, 0.04) 0px 2px 3px 0px, rgba(28, 25, 23, 0.16) 0px 8px 18px -8pxrgba(33, 32, 28, 0.04) 0px 1px 2px 0pxrgba(0, 0, 0, 0.05) 0px 1px 2px 0pxrgba(33, 32, 28, 0.08) 0px 4px 10px 0px, rgba(33, 32, 28, 0.08) 0px 2px 4px -1px, rgba(33, 32, 28, 0.05) 0px 0px 0px 1pxrgba(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 — these differhero: linear-gradient(rgb(253, 253, 252) 0%, rgb(249, 249, 248) 100%)section: radial-gradient(rgb(233, 232, 230) 0.85px, rgba(0, 0, 0, 0) 0.85px)hero: linear-gradient(rgb(17, 17, 16) 0%, rgb(25, 25, 24) 100%)section: linear-gradient(rgb(238, 238, 236) 0%, rgb(238, 238, 236) 100%)—
Opacity — these differ0.550.001.000.930.800.691.000.700.900.940.650.36
Z-index — these differbase 1base 2base 3base 4base 5base 6base 8base 9dropdown 10dropdown 50

Components

Sharedbutton-primarycardnavigationfooterlinkbutton-primarycardnavigationfooterlink
Only here — these differbutton-primary-lgcard-featuredcard-featured-smcard-smbadge-textbadge-text-2navigation-smfooter-smlink-2button-filledbutton-primary-smbutton-textbutton-text-2card-lglink-sm
Signature——

Interaction states

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

Measured — these differlink:hoverlink:focus-visiblebutton:focus-visiblecard:hoverother:hovercard:focus-visibleother:focus-visibleother:activeother:focusbutton:activebutton:hoverinput:focus-visibleinput:hoverlink:focusnav:hoverother:disabledother:focus-visibleinput:hoverother:hovercard:hoverother:focusother:disablednav:hovernav:focus-visible

Responsive

Breakpoints — these differ375→343px · 2col768→720px · 3col1024→976px · 3col1280→1240px · 3col1440→1248px · 3col375→343px · 6col768→704px · 3col1024→960px · 5col1280→1216px · 5col1440→1376px · 5col

Themes

Measured on the live site, not derived.

SupportSingle themeSingle theme

How this was measured

Differences here are ours, not the brands'.

Pages read66
Extracted — these differ2026-11-032026-10-14
StylesheetsReadableReadable
Roles unassigned — these differ510

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