Cal.com — design system & UI screens

Productivity · 1 screen · 11 sections · https://cal.com/

Light hero beside a booking calendar with Trustpilot ratings and a Deel/Ramp/Coinbase logo wall.

This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/website/cal-com.

Decoded design system

Cal.com's decoded design system: background #F4F4F4, text #374151, accent #0000EE, link #0000EE, primary #374151; type scale h1 64px / h2 48px / body 14px; 4px spacing base; 8px base radius. The single interactive/action color is #0000EE — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#F4F4F4`
surface	`#E8E9EA`
border	`#D7D9DB`
text	`#374151`
text_muted	`#7E858E`
primary	`#374151`
accent	`#0000EE`
link	`#0000EE`
secondary	`#9CA3AF`
button_bg	`rgba(0, 0, 0, 0)`
button_text	`#0000EE`

Using these colors

Action color #0000EE — the single interactive color; only on things you click or must notice, never large fills.
accent, link are all #0000EE — one role, not several (the action color).
accent #0000EE — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
primary #374151 — ≈ the text color — a foreground/text color, not an action color (action = #0000EE).
secondary #9CA3AF — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

Heading: Cal Sans
Body: Inter
Mono: Roboto Mono
h1: 64px
h2: 48px
body: 14px

Spacing

base unit: 4px
scale: 2px, 4px, 6px, 8px, 10px, 12px, 16px, 20px, 24px, 28px

Radii

base: 8px
button: 12px

Shadows (elevation)

subtle: rgba(0, 0, 0, 0) 0px 1px 3px 0px, rgba(0, 0, 0, 0) 0px 0px 2px 0px
card: rgba(19, 19, 22, 0.7) 0px 1px 5px -4px, rgba(34, 42, 53, 0.08) 0px 0px 0px 1px, rgba(34, 42, 53, 0.05) 0px 4px 8px 0px

Native design tokens

Token	Value
`--sj-tw-ring-color`	`rgba(59,130,246,.5)`
`--sj-tw-ring-offset-color`	`#fff`
`--sj-tw-ring-offset-width`	`0px`

Button states (measured)

primary focus: outline 1px auto rgb(16, 16, 16)

Motion choreography (measured)

Scroll reveal: 15 elements rest at opacity 0, translateY(-35px), animate in over 700ms.

Responsive (measured)

breakpoints: 640px · 768px · 809px · 1024px · 1199px
mobile (390px): hero 40px · nav inline

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →

Screens

The better way to schedule your meetings