Facebook Mobile — design system & UI screens

Consumer · 17 screens · facebook.com

A marketplace feed layout displaying curated "Today's picks" items in a grid with location filter (Salt Lake City, Utah). Features category tabs (Sell, For you, Local, More), profile and search icons in the header, and product cards with images, prices, and descriptions. 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/facebook-mobile.

Decoded design system

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

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