Plane — Design System

Name: Plane design system
Creator: Mozaika
Keywords: design system, design tokens, Plane, light, tailwind

light · modern · medium · tailwind · confidence 90%

Plane plays the open-source Linear: Satoshi at 58px on a precise variable weight of 430 — deliberately between regular and medium — in near-black lab() ink, with Inter at 16px and 8px-radius charcoal buttons. Project views, self-host panels and ISO badges argue enterprise-readiness while the type stays startup-crisp; issue tracking with its tie loosened exactly one notch.

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/plane.

Tokens

Plane's decoded design system: background #F7F7F8, text #1D1F20, accent #006399, link #006399, primary #006399; type scale h1 58px / h2 44px / body 16px; 8px spacing base; 8px base radius. The single interactive/action color is #090B0C — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#F7F7F8`
surface	`#E9EAEB`
border	`#D6D6D7`
text	`#1D1F20`
text_muted	`#6F7172`
primary	`#006399`
accent	`#006399`
link	`#006399`
button_bg	`#090B0C`
button_text	`#FFFFFF`

Using these colors

Action color #090B0C — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link are all #006399 — one role, not several (the action color).
accent #006399 — accent for emphasis — keep it rare on the page.

Typography

Heading: Satoshi
Body: Inter
h1: 58px
h2: 44px
body: 16px

Spacing

base unit: 8px
scale: 4px, 8px, 12px, 16px, 24px, 32px, 48px, 64px

Radii

base: 8px
button: 8px

Per-section tokens (13)

Export: DESIGN.md

# Plane — Design System

> light, modern, medium, tailwind

Plane plays the open-source Linear: Satoshi at 58px on a precise variable weight of 430 — deliberately between regular and medium — in near-black lab() ink, with Inter at 16px and 8px-radius charcoal buttons. Project views, self-host panels and ISO badges argue enterprise-readiness while the type stays startup-crisp; issue tracking with its tie loosened exactly one notch.

## Colors

| Role | Value |
|------|-------|
| bg | `#F7F7F8` |
| surface | `#E9EAEB` |
| border | `#D6D6D7` |
| text | `#1D1F20` |
| text_muted | `#6F7172` |
| primary | `#006399` |
| accent | `#006399` |
| link | `#006399` |
| button_bg | `#090B0C` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#090B0C` — 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` are all `#006399` — one role, not several.
- **accent** `#006399` — accent for emphasis — keep it rare on the page.

## Typography

- Heading: **Satoshi**
- Body: **Inter**
- h1: 58px
- h2: 44px
- body: 16px

> **Fonts —** Satoshi — free, on Fontshare. Inter — free, on Google.

## Spacing
- base unit: 8px
- scale: 4px, 8px, 12px, 16px, 24px, 32px, 48px, 64px

## Radius
- base: 8px
- button: 8px

## Primary button
- bg `#090B0C` · text `#FFFFFF` · radius 8px

## 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.

Export: Tailwind v4 (@theme)

@theme {
  /* action color #090B0C — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #F7F7F8;
  --color-surface: #E9EAEB;
  --color-border: #D6D6D7;
  --color-text: #1D1F20;
  --color-text-muted: #6F7172;
  --color-primary: #006399;  /* a brand color — but the call-to-action uses #090B0C, not this. */
  --color-accent: #006399;  /* accent for emphasis — keep it rare on the page. */
  --color-link: #006399;  /* inline text links and link-styled controls. */
  --color-button-bg: #090B0C;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* fonts: Satoshi — free, on Fontshare. Inter — free, on Google. */
  --font-heading: "Satoshi", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-h1: 58px;
  --text-h2: 44px;
  --text-body: 16px;
  --radius-base: 8px;
  --radius-button: 8px;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 24px;
  --spacing-6: 32px;
  --spacing-7: 48px;
  --spacing-8: 64px;
}

Export: CSS variables

:root {
  /* action color #090B0C — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #F7F7F8;
  --surface: #E9EAEB;
  --border: #D6D6D7;
  --text: #1D1F20;
  --text-muted: #6F7172;
  --primary: #006399;  /* a brand color — but the call-to-action uses #090B0C, not this. */
  --accent: #006399;  /* accent for emphasis — keep it rare on the page. */
  --link: #006399;  /* inline text links and link-styled controls. */
  --button-bg: #090B0C;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --font-heading: "Satoshi", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --radius: 8px;
  --radius-button: 8px;
}
/* fonts: Satoshi — free, on Fontshare. Inter — free, on Google. */