Courier — design system & UI screens

Dev Tools · 1 screen · 12 sections · https://www.courier.com/

Dark purple hero over a layered notification and inbox preview across channels.

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/courier.

Decoded design system

Courier's decoded design system: background #0A0A0A, text #ECECEE, accent #0000EE, link #083218, primary #0000EE; type scale h1 64px / h2 40px / body 14px; 4px spacing base; 12px base radius. The single interactive/action color is #E2E2E2 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#0A0A0A`
surface	`#171717`
border	`#2B2B2C`
text	`#ECECEE`
text_muted	`#969697`
primary	`#0000EE`
accent	`#0000EE`
link	`#083218`
secondary	`#00B046`
button_bg	`#E2E2E2`
button_text	`#0000EE`

Using these colors

Action color #E2E2E2 — the single interactive color; only on things you click or must notice, never large fills.
primary, accent are all #0000EE — one role, not several (the action color).
accent #0000EE — accent for emphasis — keep it rare on the page.
link #083218 — fails contrast on the background (~1.4:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
secondary #00B046 — 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: Mona Sans
Body: Mona Sans Variable
h1: 64px
h2: 40px
body: 14px

Spacing

base unit: 4px
scale: 4px, 6px, 8px, 10px, 12px, 16px, 20px, 24px, 28px, 40px

Radii

base: 12px
button: 6px

Shadow

rgba(0, 0, 0, 0.12) 0px 1px 1px 0px

Shadows (elevation)

subtle: rgba(0, 0, 0, 0.12) 0px 1px 1px 0px
card: rgba(0, 0, 0, 0.25) 0px 0.602187px 0.602187px -1.25px, rgba(0, 0, 0, 0.22) 0px 2.28853px 2.28853px -2.5px, rgba(0, 0, 0, 0.09) 0px 10px 10px -3.75px

Motion

Micro-interactions run at 5000ms (dominant) with ease-in-out.

durations: 5000ms
easings: ease-in-out

Button states (measured)

primary hover: background #FFFFFF
primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

container max-width: 1280px
nav: 56px relative

Motion choreography (measured)

Load order: span.framer-text×21

Responsive (measured)

breakpoints: 800px · 1000px · 1279px
mobile (390px): hero 32px · nav inline

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

Screens

Customer messaging for humans and agents