inspired
Mono Geist
Only black and white, tracking pulled tight.
Best for: Developer platforms, deploy, infrastructure
Not for: Lifestyle ecommerce
Deploy
Specimen
The quick brown fox
primary
secondary
tertiary
background
surface
outline
muted
success
warning
error
onPrimary
onSecondary
onTertiary
onBackground
onSurface
h1 — Design systems for agents
h2 — Design systems for agents
h3 — Design systems for agents
body — Design systems for agents
label — Design systems for agents
caption — Design systems for agents
mono — Design systems for agents
PrimarySecondaryCard
---
version: alpha
name: Mono Geist
description: Only black and white, tracking pulled tight.
colors:
primary: "#171717"
secondary: "#737373"
tertiary: "#171717"
background: "#FAFAFA"
surface: "#FFFFFF"
onPrimary: "#F4F4F5"
onSecondary: "#F4F4F5"
onTertiary: "#F4F4F5"
onBackground: "#18181B"
onSurface: "#18181B"
outline: "#E5E5E5"
muted: "#737373"
success: "#16A34A"
warning: "#CA8A04"
error: "#DC2626"
typography:
h1:
fontFamily: Geist
fontSize: 32px
fontWeight: 600
lineHeight: 1.12
letterSpacing: -0.03em
h2:
fontFamily: Geist
fontSize: 24px
fontWeight: 600
lineHeight: 1.2
letterSpacing: -0.02em
h3:
fontFamily: Geist
fontSize: 20px
fontWeight: 600
lineHeight: 1.3
letterSpacing: -0.01em
body:
fontFamily: Geist
fontSize: 16px
fontWeight: 400
lineHeight: 1.55
letterSpacing: 0em
label:
fontFamily: Geist
fontSize: 13px
fontWeight: 500
lineHeight: 1.3
letterSpacing: 0.02em
caption:
fontFamily: Geist
fontSize: 12px
fontWeight: 400
lineHeight: 1.4
letterSpacing: 0em
mono:
fontFamily: JetBrains Mono
fontSize: 13px
fontWeight: 500
lineHeight: 1.45
letterSpacing: 0em
rounded:
sm: 6px
md: 8px
lg: 12px
xl: 16px
full: 999px
spacing:
xs: 4px
sm: 8px
md: 16px
lg: 24px
xl: 32px
2xl: 48px
3xl: 64px
components:
navbar:
backgroundColor: "{colors.background}"
textColor: "{colors.onBackground}"
hero:
backgroundColor: "{colors.background}"
textColor: "{colors.onBackground}"
table:
backgroundColor: "{colors.surface}"
textColor: "{colors.onSurface}"
stat:
backgroundColor: "{colors.surface}"
textColor: "{colors.onSurface}"
rounded: "{rounded.lg}"
list-item:
backgroundColor: "{colors.surface}"
textColor: "{colors.onSurface}"
height: 44px
footer:
backgroundColor: "{colors.background}"
textColor: "{colors.muted}"
---
# Mono Geist
## Overview
Only black and white, tracking pulled tight. The atmosphere is daily-app balanced, predictable and symmetric, with static and restrained. Tone: stark, precise, quiet. Density 5/10, variance 2/10, motion 3/10. Material: Black, white, gray only. Tight tracking. No color decoration.
How to use: Place this file at the repository root. Tell Cursor / Claude Code / Codex: read DESIGN.md and obey its tokens and Do/Don'ts.
## Colors
Semantic roles for the light theme. Keep a single accent; do not introduce a second brand hue.
- **primary** (`#171717`)
- **secondary** (`#737373`)
- **tertiary** (`#171717`)
- **background** (`#FAFAFA`)
- **surface** (`#FFFFFF`)
- **outline** (`#E5E5E5`)
- **muted** (`#737373`)
- **success** (`#16A34A`)
- **warning** (`#CA8A04`)
- **error** (`#DC2626`)
- **onPrimary** (`#F4F4F5`)
- **onSecondary** (`#F4F4F5`)
- **onTertiary** (`#F4F4F5`)
- **onBackground** (`#18181B`)
- **onSurface** (`#18181B`)
## Typography
Hierarchy comes from weight and size, not from shouting. Body line length stays near 65 characters.
- **h1**: Geist 600 / 32px / 1.12 / -0.03em
- **h2**: Geist 600 / 24px / 1.2 / -0.02em
- **h3**: Geist 600 / 20px / 1.3 / -0.01em
- **body**: Geist 400 / 16px / 1.55 / 0em
- **label**: Geist 500 / 13px / 1.3 / 0.02em
- **caption**: Geist 400 / 12px / 1.4 / 0em
- **mono**: "JetBrains Mono" 500 / 13px / 1.45 / 0em
## Layout
Spacing scale: xs=4px, sm=8px, md=16px, lg=24px, xl=32px, 2xl=48px, 3xl=64px.
iOS: 44pt targets, respect Safe Area and Dynamic Type, SF Symbols, Large Titles and grouped lists.
Web: mobile-first, single column below 768px, body ≥ 16px, clamp() headlines, max-width 1120–1400px, min-h-[100dvh] for full-height sections.
Every element occupies its own spatial zone. No overlapping hero text. Collapse multi-column layouts below 768px.
## Elevation & Depth
- sm: `0 1px 2px rgba(24,24,27,0.06)`
- md: `0 8px 24px rgba(24,24,27,0.08)`
- lg: `0 18px 48px rgba(24,24,27,0.12)`
- surface: `flat`
- recipe: Black, white, gray only. Tight tracking. No color decoration.
Tint shadows toward the background hue. High-density layouts may replace cards with hairline dividers.
## Shapes
Radius scale: sm=6px, md=8px, lg=12px, xl=16px, full=999px.
## Components
- **Navbar** (`web.navbar` / default / md): Desktop nav with logo, icon links, and one primary CTA.
- **Hero** (`web.hero` / left / lg): Hero uses left layout, one CTA, no "Scroll to explore".
- **Data Table** (`web.table` / default / md): Mono numbers, quiet headers, tappable rows.
- **Stat** (`stat` / default / md): Numbers in mono, labels in quiet uppercase.
- **List Item** (`list-item` / chevron / md): Min 44pt rows, title + subtitle, optional chevron.
- **List Item** (`list-item` / chevron / md): Min 44pt rows, title + subtitle, optional chevron.
- **List Item** (`list-item` / chevron / md): Min 44pt rows, title + subtitle, optional chevron.
- **Footer** (`web.footer` / default / md): Quiet footer with clear link groups.
## Do's and Don'ts
### Do
- Use semantic color tokens, never raw hex in components.
- Keep a single accent; hierarchy comes from type weight and space.
- Define default, hover, focus-visible, pressed, disabled, and loading states.
- Meet WCAG 2.2 AA contrast for body text and interactive labels.
- Touch targets are at least 44×44pt on iOS and 44px on web.
### Don't
- Do not use Inter as the display face for premium work.
- Do not use pure black #000000 for large surfaces.
- Do not add neon outer glows or custom mouse cursors.
- Do not ship three equal feature cards as the default layout.
- Do not hide focus rings or drop below AA contrast.