Facebook Mobile — Design System

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

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

Facebook 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/facebook-mobile.

Tokens

Facebook Mobile's decoded design system: background #FFFFFF, text #000000, accent #0068FF, link #0068FF, primary #0068FF; type scale h1 34px / h2 22px / body 17px; 8px spacing base; 12px base radius. The single interactive/action color is #0068FF — 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	`#0068FF`
accent	`#0068FF`
link	`#0068FF`
button_bg	`#0068FF`
button_text	`#FFFFFF`

Using these colors

Action color #0068FF — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #0068FF — one role, not several (the action color).
accent #0068FF — 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: 2px, 4px, 6px, 8px, 10px, 12px, 16px, 20px, 30px, 32px

Radii

base: 12px
button: 12px

Shadows (elevation)

subtle: rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px
card: rgba(0, 0, 0, 0.2) 0px 2px 12px 0px

Motion

Micro-interactions run at 100ms (dominant) with cubic-bezier(0, 0, 1, 1).

durations: 100ms · 200ms · 150ms
easings: cubic-bezier(0, 0, 1, 1) · cubic-bezier(0.08, 0.52, 0.52, 1)
animated properties: none

Native design tokens

Token	Value
`--fds-black`	`#000000`
`--fds-black-alpha-05`	`rgba(0, 0, 0, 0.05)`
`--fds-black-alpha-10`	`rgba(0, 0, 0, 0.1)`
`--fds-black-alpha-15`	`rgba(0, 0, 0, 0.15)`
`--fds-black-alpha-20`	`rgba(0, 0, 0, 0.2)`
`--fds-black-alpha-30`	`rgba(0, 0, 0, 0.3)`
`--fds-black-alpha-40`	`rgba(0, 0, 0, 0.4)`
`--fds-black-alpha-50`	`rgba(0, 0, 0, 0.5)`
`--fds-black-alpha-60`	`rgba(0, 0, 0, 0.6)`
`--fds-black-alpha-80`	`rgba(0, 0, 0, 0.8)`

…and 110 more measured on the page.

Motion choreography (measured)

Scroll reveal: 7 elements rest at opacity 0, animate in over 0.1s cubic-bezier(0, 0, 1, 1).

Overlay recipe (measured)

dialog panel: #FFFFFF · radius 16px

Input (measured)

height 38px · radius 0px

Responsive (measured)

breakpoints: 480px · 768px · 1024px · 1099px · 1439px · 1920px
mobile (390px): nav inline

Export: DESIGN.md

# Facebook Mobile — Design System

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

Facebook 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 | `#0068FF` |
| accent | `#0068FF` |
| link | `#0068FF` |
| button_bg | `#0068FF` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#0068FF` — 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 `#0068FF` — one role, not several (your action color).
- **accent** `#0068FF` — 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): `#666666` 65.9% · `#EFF0EF` 15.3% · `#FEFEFE` 11.1% · `#333A46` 4.3%

## Typography


| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 59px / 600 · lh 66px |
| h2 | 24px / 700 · lh 28px |
| h3 | 20px / 700 · lh 24px |
| body | 15px / 400 · lh 20px |

- Weight ladder: 400 · 500 · 600 · 700 — use these exact measured weights, not the 400/600 defaults.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 2px, 4px, 6px, 8px, 10px, 12px, 16px, 20px, 30px, 32px — snap all gaps/padding to these

## Radius
- base: 12px
- button: 12px
- card: 22px
- pill: 9999px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `rgba(0, 0, 0, 0)` / `#1C1E21` | none | 12px | 0px 0px 0px 0px | 400 12px | none |

## Shadows (elevation)
- subtle: `rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px`
- card: `rgba(0, 0, 0, 0.2) 0px 2px 12px 0px`

## Motion
- durations: 100ms (dominant) · 200ms · 150ms
- easings: `cubic-bezier(0, 0, 1, 1)` (dominant) · `cubic-bezier(0.08, 0.52, 0.52, 1)`
- animated properties: none

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 |
|-------|-------|
| `--fds-black` | `#000000` |
| `--fds-black-alpha-05` | `rgba(0, 0, 0, 0.05)` |
| `--fds-black-alpha-10` | `rgba(0, 0, 0, 0.1)` |
| `--fds-black-alpha-15` | `rgba(0, 0, 0, 0.15)` |
| `--fds-black-alpha-20` | `rgba(0, 0, 0, 0.2)` |
| `--fds-black-alpha-30` | `rgba(0, 0, 0, 0.3)` |
| `--fds-black-alpha-40` | `rgba(0, 0, 0, 0.4)` |
| `--fds-black-alpha-50` | `rgba(0, 0, 0, 0.5)` |
| `--fds-black-alpha-60` | `rgba(0, 0, 0, 0.6)` |
| `--fds-black-alpha-80` | `rgba(0, 0, 0, 0.8)` |
| `--fds-blue-05` | `#ECF3FF` |
| `--fds-blue-30` | `#AAC9FF` |

_…and 108 more measured on the page._

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

## Motion choreography (measured)
- scroll reveal: 7 elements rest at opacity 0, animate in over 0.1s cubic-bezier(0, 0, 1, 1) (0 revealed during the drive).
- overlay dialog (auto-opened): panel #FFFFFF · r 16px · shadow rgba(0, 0, 0, 0.2) 0px 12px 28px 0px, rgba(0, 0, 0, 0.1) 0px 2px 4px 0px, rgba(255, 255, 255, 0.5) 0px 0px 0px 1px inset

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

## Components (measured)
- input: h 38px · r 0px · bg rgba(0, 0, 0, 0) · placeholder #111112

## Responsive (measured)
- breakpoints: 480px · 768px · 1024px · 1099px · 1439px · 1920px
- mobile (390px): body 12px · nav: inline

## 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/facebook-mobile

Export: Tailwind v4 (@theme)

@theme {
  /* action color #0068FF — 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: #0068FF;  /* primary brand / action color. */
  --color-accent: #0068FF;  /* 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: #0068FF;  /* inline text links — shares the action color. */
  --color-button-bg: #0068FF;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* measured weights: 400, 500, 600, 700 — use these, not 400/600 */
  --text-hero: 59px; --font-weight-hero: 600; --leading-hero: 66px;
  --text-h2: 24px; --font-weight-h2: 700; --leading-h2: 28px;
  --text-h3: 20px; --font-weight-h3: 700; --leading-h3: 24px;
  --text-body: 15px; --font-weight-body: 400; --leading-body: 20px;
  --radius-base: 12px;
  --radius-button: 12px;
  --radius-card: 22px;
  --radius-pill: 9999px;
  --shadow-card: rgba(0, 0, 0, 0.2) 0px 2px 12px 0px;
  --shadow-subtle: rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px;
  --ease-brand: cubic-bezier(0, 0, 1, 1);
  --duration-fast: 100ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 150ms;
  --duration-slow: 200ms;
  --spacing: 8px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 2, 4, 6, 8, 10, 12, 16, 20, 30, 32px */
}

Export: CSS variables

:root {
  /* action color #0068FF — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FFFFFF;
  --surface: #EFEFEF;
  --border: #D8D8D8;
  --text: #000000;
  --text-muted: #606060;
  --primary: #0068FF;  /* primary brand / action color. */
  --accent: #0068FF;  /* 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: #0068FF;  /* inline text links — shares the action color. */
  --button-bg: #0068FF;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --text-hero: 59px; --weight-hero: 600; --leading-hero: 66px;
  --text-h2: 24px; --weight-h2: 700; --leading-h2: 28px;
  --text-h3: 20px; --weight-h3: 700; --leading-h3: 24px;
  --text-body: 15px; --weight-body: 400; --leading-body: 20px;
  --radius: 12px;
  --radius-button: 12px;
  --radius-card: 22px;
  --radius-pill: 9999px;
  --shadow-card: rgba(0, 0, 0, 0.2) 0px 2px 12px 0px;
  --shadow-subtle: rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px;
  --ease: cubic-bezier(0, 0, 1, 1);
  --duration-fast: 100ms;
  --duration-base: 150ms;
  --duration-slow: 200ms;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --fds-black: #000000;
  --fds-black-alpha-05: rgba(0, 0, 0, 0.05);
  --fds-black-alpha-10: rgba(0, 0, 0, 0.1);
  --fds-black-alpha-15: rgba(0, 0, 0, 0.15);
  --fds-black-alpha-20: rgba(0, 0, 0, 0.2);
  --fds-black-alpha-30: rgba(0, 0, 0, 0.3);
  --fds-black-alpha-40: rgba(0, 0, 0, 0.4);
  --fds-black-alpha-50: rgba(0, 0, 0, 0.5);
  --fds-black-alpha-60: rgba(0, 0, 0, 0.6);
  --fds-black-alpha-80: rgba(0, 0, 0, 0.8);
  --fds-blue-05: #ECF3FF;
  --fds-blue-30: #AAC9FF;
}