Ghostty — decoded design system

ghostty.org · dark · modern · custom · deep decode — measured live

Ghostty'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/ghostty.org.

Decoded design system

Ghostty's decoded design system: background #0F0F11, text #FFFFFF, accent #3551F3, link #F0F0F4, primary #70B8DB; type scale h1 16px / h2 16px / body 16px; 4px spacing base; 8px base radius. The single interactive/action color is #0F0F11 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #0F0F11 — the single interactive color; only on things you click or must notice, never large fills.
• accent #3551F3 — accent for emphasis — keep it rare on the page.
• primary #70B8DB — a brand color — but the call-to-action uses #0F0F11, not this.
• link #F0F0F4 — reads as a neutral UI color, not a link accent — verify against the reference (action = #0F0F11).
• secondary #BF8CD9 — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

• Heading: JetBrains Mono
• Body: JetBrains Mono
• Mono: JetBrains Mono
• h1: 16px
• h2: 16px
• body: 16px

Spacing

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

Radii

• base: 8px
• button: 6px

Motion

Micro-interactions run at 150ms (dominant) with ease.

• durations: 150ms
• easings: ease
• animated properties: background-color

Native design tokens

…and 21 more measured on the page.

Button states (measured)

• primary hover: background #3551F3
• primary focus: outline 1px auto rgb(16, 16, 16)

Layout (measured)

• container max-width: 840px
• common grid: 3 columns

Responsive (measured)

• breakpoints: 600px · 650px · 660px · 768px · 784px · 950px
• 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/ghostty.org

registry item · or query it over MCP: get_design_system("Ghostty")

Export: DESIGN.md

# Ghostty — Design System

> dark, modern, medium, custom — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#0F0F11` |
| surface | `#1D1D1F` |
| border | `#333334` |
| text | `#FFFFFF` |
| text_muted | `#A3A3A4` |
| primary | `#70B8DB` |
| accent | `#3551F3` |
| link | `#F0F0F4` |
| secondary | `#BF8CD9` |
| button_bg | `#0F0F11` |
| button_text | `#F0F0F4` |

**Using these colors**

- **Action color** `#0F0F11` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- **accent** `#3551F3` — accent for emphasis — keep it rare on the page.
- **primary** `#70B8DB` — a brand color — but the call-to-action uses #0F0F11, not this.
- **link** `#F0F0F4` — reads as a neutral UI color, not a link accent — verify against the reference (action = #0F0F11).
- **secondary** `#BF8CD9` — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.
- **Page coverage** (full-page screenshot pixels): `#0F0F11` 89.5% · `#202129` 3.8% · `#3D3C3E` 3.4% · `#585858` 3.3%

## Typography

- Heading: **JetBrains Mono**
- Body: **JetBrains Mono**
- Mono: **JetBrains Mono**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| body | 16px / 400 · lh 22px |
| small | 14px / 300 · lh 20px |

- Weight ladder: 300 · 400 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** JetBrains Mono — free, on Google.

## Spacing
- base unit: 4px
- scale: 2px, 4px, 6px, 8px, 12px, 16px, 24px, 32px

## Radius
- base: 8px
- button: 6px
- card: 6px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `rgba(0, 0, 0, 0)` / `#F0F0F4` | 1px solid rgb(53, 81, 243) | 6px | 10px 34px 10px 34px | 400 16px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#F0F0F4` | 1px solid rgb(76, 76, 80) | 6px | 10px 34px 10px 34px | 400 16px | none |

**States (measured, not guessed)**

- primary hover: background `#3551F3`
- primary focus: outline `1px auto rgb(16, 16, 16)`
- secondary hover: background `#4C4C50`
- transition: `background-color 0.15s ease`

## Motion
- durations: 150ms (dominant)
- easings: `ease` (dominant)
- animated properties: background-color

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 |
|-------|-------|
| `--brand-color` | `#3551f3` |
| `--gray-0` | `#0f0f11` |
| `--gray-1` | `#16161a` |
| `--gray-2` | `#242428` |
| `--gray-3` | `#4c4c50` |
| `--gray-4` | `#828286` |
| `--gray-5` | `#959597` |
| `--gray-6` | `#c3c3c4` |
| `--gray-7` | `#dbdbdc` |
| `--gray-8` | `#eaeaeb` |
| `--gray-9` | `#f0f0f4` |
| `--black` | `#000` |

_…and 19 more measured on the page._

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

## Layout (measured)
- container max 840px · common grid: 3-col

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 96 | 604 | 3 | — | 0/0 | — |

## Responsive (measured)
- breakpoints: 600px · 650px · 660px · 768px · 784px · 950px
- 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.

← All decoded design systems

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