Are.na — decoded design system

are.na · light · minimalist · custom · deep decode — measured live

Are.na'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/are.na.

Decoded design system

Are.na's decoded design system: background #FFFFFF, text #000000, accent #00075F, link #FFFFFF, primary #000000; type scale h1 16px / h2 16px / body 16px; 5px spacing base; 0px base radius. The single interactive/action color is #F7F7F7 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #F7F7F7 — the single interactive color; only on things you click or must notice, never large fills.
• accent #00075F — accent for emphasis — keep it rare on the page.
• primary #000000 — ≈ the text color — a foreground/text color, not an action color (action = #F7F7F7).
• link #FFFFFF — fails contrast on the background (~1.0:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).

Typography

• Heading: Arial
• Body: Arial
• h1: 16px
• h2: 16px
• body: 16px

Spacing

• base unit: 5px
• scale: 5px, 10px, 15px, 20px, 25px, 35px, 65px, 100px, 130px

Radii

• base: 0px
• button: 3px

Native design tokens

…and 70 more measured on the page.

Button states (measured)

• primary hover: border 1px solid rgb(222, 222, 222) · color #000000
• primary focus: border 1px solid rgb(61, 70, 194) · color #000000

Layout (measured)

• container max-width: 650px
• nav: 55px fixed
• common grid: 12 columns

Motion choreography (measured)

Load order: div.c-iYglRF

Overlay recipe (measured)

dialog panel: #FFFFFF · radius 3px · enter 400ms linear

Themes

dark counterpart: background #000000, text #FFFFFF.

Responsive (measured)

• breakpoints: 520px · 900px · 1800px
• 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/are.na

registry item · or query it over MCP: get_design_system("Are.na")

Export: DESIGN.md

# Are.na — Design System

> light, minimalist, low, custom — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#EFEFEF` |
| border | `#D8D8D8` |
| text | `#000000` |
| text_muted | `#606060` |
| primary | `#000000` |
| accent | `#00075F` |
| link | `#FFFFFF` |
| button_bg | `#F7F7F7` |
| button_text | `#333333` |

**Using these colors**

- **Action color** `#F7F7F7` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- **accent** `#00075F` — accent for emphasis — keep it rare on the page.
- **primary** `#000000` — ≈ the text color — a foreground/text color, not an action color (action = #F7F7F7).
- **link** `#FFFFFF` — fails contrast on the background (~1.0:1) — 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` 95.4% · `#B2B2B2` 1.6% · `#D0CFCF` 1.1% · `#E8E7E7` 1.1%

## Typography

- Heading: **Arial**
- Body: **Arial**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| body | 16px / 400 · lh 23px |
| small | 14px / 700 · lh 21px |

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

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

## Spacing
- base unit: 5px (inferred from the measured scale)
- measured scale: 5px, 10px, 15px, 20px, 25px, 35px, 65px, 100px, 130px — snap all gaps/padding to these

## Radius
- base: 0px
- button: 3px
- card: 50px
- sharp: 3px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#F7F7F7` / `#333333` | 1px solid rgba(0, 0, 0, 0) | 3px | 0px 10px 0px 10px | 700 12.5px | none |
| secondary | `#F7F7F7` / `#333333` | 1px solid rgba(0, 0, 0, 0) | 3px | 0px 10px 0px 10px | 700 12.5px | none |

**States (measured, not guessed)**

- primary hover: border `1px solid rgb(222, 222, 222)` · color `#000000`
- primary focus: border `1px solid rgb(61, 70, 194)` · color `#000000`
- secondary hover: border `1px solid rgb(222, 222, 222)` · color `#000000`

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--colors-channelPrivate2` | `#DFBEBE` |
| `--colors-foregroundLight` | `rgba(0, 0, 0, 0.6)` |
| `--colors-focus` | `#3D46C2` |
| `--colors-red2` | `#DFBEBE` |
| `--colors-link` | `#333` |
| `--colors-slate` | `#696969` |
| `--colors-gray7` | `#000` |
| `--colors-channelClosed3` | `#333` |
| `--colors-channelPublic1` | `#F4F8F3` |
| `--colors-notification` | `#A87253` |
| `--colors-foregroundShadow` | `rgba(0, 0, 0, 0.08)` |
| `--colors-gray3` | `#DEDEDE` |

_…and 68 more measured on the page._

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

## Layout (measured)
- container max 650px · common grid: 12-col
- nav: 55px fixed · bg #FFFFFF

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 55 | 2603 | 12 | 15 | 0/0 | — |

## Motion choreography (measured)
Load order: `div.c-iYglRF` @0ms
- overlay dialog (auto-opened): panel #FFFFFF · r 3px · border 1px solid rgb(237, 237, 237) · shadow rgba(0, 0, 0, 0.08) 0px 0px 20px 0px
  - enter: transform+opacity from translateY(-10px) scale(0.96),0 · 400ms linear

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

## Components (measured)
- link: #333333 · no underline

## Themes (both measured)
- dark counterpart: bg `#000000` · text `#FFFFFF`
- tokens that flip between modes:
  - `--colors-channelPrivate2`: `#DFBEBE` → `#412020`
  - `--colors-foregroundLight`: `rgba(0, 0, 0, 0.6)` → `rgba(255, 255, 255, 0.8)`
  - `--colors-focus`: `#3D46C2` → `#5E6DEE`
  - `--colors-red2`: `#DFBEBE` → `#412020`
  - `--colors-link`: `#333` → `#E5E5E5`
  - `--colors-slate`: `#696969` → `#B2B2B2`
  - `--colors-gray7`: `#000` → `#FFF`
  - `--colors-channelClosed3`: `#333` → `#E5E5E5`

## Responsive (measured)
- breakpoints: 520px · 900px · 1800px
- mobile (390px): body 16px · 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.

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