Slack Mobile — design system & UI screens

Communication · 7 screens · slack.com

A workspace hub for managing integrated apps and notifications. The screen displays quick-action cards for catching up on messages and saved items, followed by a collapsible list of connected third-party applications (Salesforce, Google Drive, Google Calendar, Writer, Linear, Gusto, Calendly, Stripe, and others) with notification badges. Purple navigation header with search, status indicator showing calendar meeting availability, and user profile access.

Open in Mozaika →

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/slack-mobile.

Decoded design system

Slack Mobile's decoded design system: background #FFFFFF, text #000000, accent #7C2852, link #7C2852, primary #7C2852; type scale h1 34px / h2 22px / body 17px; 4px spacing base; 12px base radius. The single interactive/action color is #7C2852 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FFFFFF`
surface	`#EFEFEF`
border	`#D8D8D8`
text	`#000000`
text_muted	`#606060`
primary	`#7C2852`
accent	`#7C2852`
link	`#7C2852`
button_bg	`#7C2852`
button_text	`#FFFFFF`

Using these colors

Action color #7C2852 — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #7C2852 — one role, not several (the action color).
accent #7C2852 — 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.

Typography

h1: 34px
h2: 22px
body: 17px

Spacing

base unit: 4px
scale: 2px, 4px, 5px, 7px, 8px, 10px, 12px, 16px, 18px, 24px

Radii

base: 12px
button: 12px

Shadows (elevation)

subtle: rgba(0, 0, 0, 0.08) 0px 1px 3px 0px
card: rgba(0, 0, 0, 0.1) 0px 0px 32px 0px
overlay: rgba(0, 0, 0, 0.1) 0px 5px 20px 0px

Motion

Micro-interactions run at 420ms (dominant) with cubic-bezier(0.165, 0.84, 0.44, 1).

durations: 420ms · 200ms · 500ms
easings: cubic-bezier(0.165, 0.84, 0.44, 1) · linear
animated properties: transform, box-shadow, color, background

Native design tokens

Token	Value
`--article-theme-primary`	`#4a154b`
`--article-theme-secondary`	`#fff`
`--sidebar-color`	`#400d40`
`--sidebar-highlight-color`	`#1264a3`
`--attachment-color`	`#000`
`--font-family-monospace`	`"Monaco", "Menlo", "Consolas", "Courier New", monospace`

Button states (measured)

primary hover: background #4A154B
primary focus: border-radius 0px · outline 2px dotted rgb(97, 31, 105)

Layout (measured)

container max-width: 1230px
common grid: 2 columns

Motion choreography (measured)

Load order: div.progress-bar → div.c-bento-sticky-toc → img.c-accordion-carousel__as×4 → div.comp-customer-videos__ca → h3.comp-customer-videos__ca → div.comp-customer-videos__ca

Scroll reveal: 5 elements rest at opacity 0, animate in over 8000ms.

Responsive (measured)

breakpoints: 330px · 426px · 527px · 549px · 600px · 896px
mobile (390px): hero 32px · nav hamburger

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