Threads Mobile — decoded design system

threads.net · light · consumer · deep decode — measured live

Threads Mobile's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

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/decode/threads.net.

Decoded design system

Threads Mobile's decoded design system: background #FAFAFA, text #000000, accent #FFEC00, link #999999, primary #FFEC00; type scale h1 20px / h2 22px / body 15px; 4px spacing base; 12px base radius. The single interactive/action color is #000000 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #000000 — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent are all #FFEC00 — one role, not several (the action color).
• accent #FFEC00 — accent for emphasis — keep it rare on the page.
• link #999999 — fails contrast on the background (~2.7:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).

Typography

• Heading: system-ui
• Body: system-ui
• h1: 20px
• h2: 22px
• body: 15px

Spacing

• base unit: 4px
• scale: 2px, 4px, 6px, 8px, 12px, 15px, 16px, 20px, 24px, 32px

Radii

• base: 12px
• button: 10px

Shadows (elevation)

• card: rgba(0, 0, 0, 0.04) 0px 0px 12px 0px
• overlay: rgba(0, 0, 0, 0.08) 0px 10px 21px 0px

Motion

Micro-interactions run at 200ms (dominant) with ease.

• durations: 200ms · 300ms · 150ms
• easings: ease · ease-in-out
• animated properties: none

Native design tokens

…and 110 more measured on the page.

Button states (measured)

• primary focus: box-shadow rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px

Motion choreography (measured)

Load order: div.x4afe7t → div.x1a2a7pz×8 → ::view-transition-group×2

Overlay recipe (measured)

dialog panel: rgba(0, 0, 0, 0) · radius 0px

Themes

dark counterpart: background #0A0A0A, text #F3F5F7.

Responsive (measured)

• mobile (390px): nav inline

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/threads.net

Or as a Meta Astryx theme — a ready defineTheme file with the measured hover/press states baked in:

curl -o src/themes/threads.theme.ts https://mozaika.design/api/astryx/decode/threads.net.ts

registry item · astryx theme · or query it over MCP: get_design_system("Threads Mobile")

Export: DESIGN.md

# Threads Mobile — Design System

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

## Colors

| Role | Value |
|------|-------|
| bg | `#FAFAFA` |
| surface | `#EBEBEB` |
| border | `#D4D4D4` |
| text | `#000000` |
| text_muted | `#5F5F5F` |
| primary | `#FFEC00` |
| accent | `#FFEC00` |
| link | `#999999` |
| button_bg | `#000000` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#000000` — 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` are all `#FFEC00` — one role, not several.
- **accent** `#FFEC00` — accent for emphasis — keep it rare on the page.
- **link** `#999999` — fails contrast on the background (~2.7:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
- **Page coverage** (full-page screenshot pixels): `#FFFFFF` 97.6% · `#C8C8C8` 2.4%

## Typography

- Heading: **system-ui**
- Body: **system-ui**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 20px / 700 · lh 25px |
| body | 15px / 600 · lh 21px |
| small | 13px / 400 · lh 18px |

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

> **Fonts —** system-ui — system font, no web load needed.

## Spacing
- base unit: 4px (inferred from the measured scale)
- measured scale: 2px, 4px, 6px, 8px, 12px, 15px, 16px, 20px, 24px, 32px — snap all gaps/padding to these

## Radius
- base: 12px
- button: 10px
- card: 8px
- pill: 9999px
- sharp: 1px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#000000` / `#FFFFFF` | 1px solid rgb(0, 0, 0) | 10px | 0px 16px 0px 16px | 600 15px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#000000` | 1px solid rgba(0, 0, 0, 0.15) | 10px | 0px 16px 0px 16px | 600 15px | none |

**States (measured, not guessed)**

- primary focus: box-shadow `rgb(255, 255, 255) 0px 0px 0px 2px, rgb(24, 119, 242) 0px 0px 0px 4px`
- transition: `none 0.1s ease-in-out`

## Shadows (elevation)
- card: `rgba(0, 0, 0, 0.04) 0px 0px 12px 0px`
- overlay: `rgba(0, 0, 0, 0.08) 0px 10px 21px 0px`

## Motion
- durations: 200ms (dominant) · 300ms · 150ms
- easings: `ease` (dominant) · `ease-in-out`
- 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)
Load order: `div.x4afe7t` @0ms → `div.x1a2a7pz`×8 @0ms → ``×2 @498ms
- overlay dialog (auto-opened): panel rgba(0, 0, 0, 0) · r 0px

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

## Themes (both measured)
- dark counterpart: bg `#0A0A0A` · text `#F3F5F7`
- tokens that flip between modes:
  - `--fds-black`: `#000000` → `black`
  - `--fds-blue-05`: `#ECF3FF` → `black`
  - `--fds-blue-30`: `#AAC9FF` → `black`
  - `--fds-blue-40`: `#77A7FF` → `black`
  - `--fds-blue-60`: `#1877F2` → `black`
  - `--fds-blue-70`: `#2851A3` → `black`
  - `--fds-blue-80`: `#1D3C78` → `black`
  - `--fds-button-text`: `#444950` → `black`

## Responsive (measured)
- mobile (390px): body 15px · 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/decode/threads.net

← All decoded design systems

An automated reading of Threads Mobile's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with threads.net. No screenshots stored. Removal requests: hello@mozaika.design.