Slack Mobile — design system & UI screens

Communication · 7 screens · slack.com

A team collaboration dashboard featuring quick-access sections (Catch up, Threads, Later, Drafts) at the top, an active huddle banner, VIP unreads list with private and public channels, and expandable Active Projects section with a floating compose action button. Official Google Play listing screenshot.

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; 8px 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: 8px
scale: 4px, 8px, 12px, 16px, 24px, 32px, 48px, 64px

Radii

base: 12px
button: 12px

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