Slack Mobile — Design System

Name: Slack Mobile design system
Creator: Mozaika
Keywords: design system, design tokens, Slack Mobile, light

light · consumer · high · confidence 85% · deep decode

Slack Mobile — palette measured from official store listing screenshots (colors only; no font claims). Type scale shown is the platform HIG default.

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/ds/slack-mobile.

Tokens

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

Export: DESIGN.md

# Slack Mobile — Design System

> light, consumer, high — deep decode (measured live)

Slack Mobile — palette measured from official store listing screenshots (colors only; no font claims). Type scale shown is the platform HIG default.

## Colors

| 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; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `accent`, `link`, `button_bg` are all `#7C2852` — one role, not several (your 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.
- **Page coverage** (full-page screenshot pixels): `#FFFFFF` 80.9% · `#EBEAEB` 5.2% · `#2E0541` 3.7% · `#CBC2C9` 3.7%

## Typography


| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 76px / 400 |
| h2 | 64px / 700 · lh 72px · tracking -0.77px |
| h3 | 58px / 600 · lh 56px |
| body | 18px / 400 · lh 28px |
| small | 16px / 400 · lh 25px · tracking -0.02px |
| eyebrow | 12px / 700 · tracking 0.68px |

- Weight ladder: 300 · 400 · 600 · 700 — use these exact measured weights, not the 400/600 defaults.

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 2px, 4px, 5px, 7px, 8px, 10px, 12px, 16px, 18px, 24px — snap all gaps/padding to these
- section rhythm: 80px top/bottom padding per section (measured)

## Radius
- base: 12px
- button: 12px
- card: 16px
- pill: 9999px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#611F69` / `#FFFFFF` | none | 4px | 12px 16px 12px 16px | 700 14px / 0.798px | none |

**States (measured, not guessed)**

- primary hover: background `#4A154B`
- primary focus: border-radius `0px` · outline `2px dotted rgb(97, 31, 105)`
- transition: `box-shadow 0.42s cubic-bezier(0.165, 0.84, 0.44, 1)`

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

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| 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` |

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1230px · common grid: 2-col
- nav: 0px

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 40 | 1146 | 2 | — | 104/50 | 16/84 |
| 1186 | 863 | — | — | 80/80 | — |
| 1574 | 395 | — | — | 0/0 | — |
| 2177 | 736 | — | — | 48/96 | — |

## Motion choreography (measured)
Load order: `div.progress-bar` @0ms → `div.c-bento-sticky-toc` @529ms → `img.c-accordion-carousel__as`×4 @529ms → `div.comp-customer-videos__ca` @529ms → `h3.comp-customer-videos__ca` @529ms → `div.comp-customer-videos__ca` @2259ms
- scroll reveal: 5 elements rest at opacity 0, animate in over 8000ms (0 revealed during the drive).

Rebuild the timeline, not just the durations — order, delays and staggers above are the choreography.

## Components (measured)
- link: #FFFFFF · no underline
- disabled: bg #FFFFFF · text #000000

## Responsive (measured)
- breakpoints: 330px · 426px · 527px · 549px · 600px · 896px
- mobile (390px): hero 32px · body 16px · nav: hamburger

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

---

> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/ds/slack-mobile

Export: Tailwind v4 (@theme)

@theme {
  /* action color #7C2852 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FFFFFF;
  --color-surface: #EFEFEF;
  --color-border: #D8D8D8;
  --color-text: #000000;
  --color-text-muted: #606060;
  --color-primary: #7C2852;  /* primary brand / action color. */
  --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. */
  --color-link: #7C2852;  /* inline text links — shares the action color. */
  --color-button-bg: #7C2852;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* measured weights: 300, 400, 600, 700 — use these, not 400/600 */
  --text-hero: 76px; --font-weight-hero: 400;
  --text-h2: 64px; --font-weight-h2: 700; --leading-h2: 72px; --tracking-h2: -0.77px;
  --text-h3: 58px; --font-weight-h3: 600; --leading-h3: 56px;
  --text-body: 18px; --font-weight-body: 400; --leading-body: 28px;
  --text-small: 16px; --font-weight-small: 400; --leading-small: 25px; --tracking-small: -0.02px;
  --text-eyebrow: 12px; --font-weight-eyebrow: 700; --tracking-eyebrow: 0.68px;
  --radius-base: 12px;
  --radius-button: 12px;
  --radius-card: 16px;
  --radius-pill: 9999px;
  --radius-sharp: 2px;
  --shadow-card: rgba(0, 0, 0, 0.1) 0px 0px 32px 0px;
  --shadow-overlay: rgba(0, 0, 0, 0.1) 0px 5px 20px 0px;
  --shadow-subtle: rgba(0, 0, 0, 0.08) 0px 1px 3px 0px;
  --color-btn-hover: #4A154B;  /* measured primary hover fill */
  --outline-focus: 2px dotted rgb(97, 31, 105);  /* measured focus ring */
  --ease-brand: cubic-bezier(0.165, 0.84, 0.44, 1);
  --duration-fast: 200ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 420ms;
  --duration-slow: 500ms;
  --section-y: 80px;  /* per-section vertical padding (measured) */
  --spacing: 4px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 2, 4, 5, 7, 8, 10, 12, 16, 18, 24px */
}

Export: CSS variables

:root {
  /* action color #7C2852 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FFFFFF;
  --surface: #EFEFEF;
  --border: #D8D8D8;
  --text: #000000;
  --text-muted: #606060;
  --primary: #7C2852;  /* primary brand / 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. */
  --link: #7C2852;  /* inline text links — shares the action color. */
  --button-bg: #7C2852;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --text-hero: 76px; --weight-hero: 400;
  --text-h2: 64px; --weight-h2: 700; --leading-h2: 72px; --tracking-h2: -0.77px;
  --text-h3: 58px; --weight-h3: 600; --leading-h3: 56px;
  --text-body: 18px; --weight-body: 400; --leading-body: 28px;
  --text-small: 16px; --weight-small: 400; --leading-small: 25px; --tracking-small: -0.02px;
  --text-eyebrow: 12px; --weight-eyebrow: 700; --tracking-eyebrow: 0.68px;
  --radius: 12px;
  --radius-button: 12px;
  --radius-card: 16px;
  --radius-pill: 9999px;
  --radius-sharp: 2px;
  --shadow-card: rgba(0, 0, 0, 0.1) 0px 0px 32px 0px;
  --shadow-overlay: rgba(0, 0, 0, 0.1) 0px 5px 20px 0px;
  --shadow-subtle: rgba(0, 0, 0, 0.08) 0px 1px 3px 0px;
  --btn-bg-hover: #4A154B;
  --focus-ring: 2px dotted rgb(97, 31, 105);
  --ease: cubic-bezier(0.165, 0.84, 0.44, 1);
  --duration-fast: 200ms;
  --duration-base: 420ms;
  --duration-slow: 500ms;
  --section-y: 80px;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --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;
}