Mono UI — Design System

Name: Mono UI design system
Creator: Mozaika
Keywords: design system, design tokens, Mono UI, light, react

light · modern · medium · react · confidence 95%

The Mono theme — a cohesive shadcn/ui design system (measured tokens).

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/mono-ui.

Tokens

Mono UI's decoded design system: background #FFFFFF, text #0A0A0A, accent #737373, link #737373, primary #737373; type scale h1 36px / h2 24px / body 14px; 4px spacing base; 0px base radius. The single interactive/action color is #737373 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FFFFFF`
surface	`#F0F0F0`
border	`#DADADA`
text	`#0A0A0A`
text_muted	`#676767`
primary	`#737373`
accent	`#737373`
link	`#737373`
button_bg	`#737373`
button_text	`#FAFAFA`

Using these colors

Action color #737373 — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, link, button_bg are all #737373 — one role, not several (the action color).
accent #737373 — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.

Typography

Heading: Geist Mono
Body: Geist Mono
h1: 36px
h2: 24px
body: 14px

Spacing

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

Radii

base: 0px
button: 0px

Export: DESIGN.md

# Mono UI — Design System

> light, modern, medium, react

The Mono theme — a cohesive shadcn/ui design system (measured tokens).

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#F0F0F0` |
| border | `#DADADA` |
| text | `#0A0A0A` |
| text_muted | `#676767` |
| primary | `#737373` |
| accent | `#737373` |
| link | `#737373` |
| button_bg | `#737373` |
| button_text | `#FAFAFA` |

**Using these colors**

- **Action color** `#737373` — 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`, `button_bg` are all `#737373` — one role, not several (your action color).
- **accent** `#737373` — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.

## Typography

- Heading: **Geist Mono** _(free fallback: JetBrains Mono)_
- Body: **Geist Mono** _(free fallback: JetBrains Mono)_
- h1: 36px
- h2: 24px
- body: 14px

> **Fonts —** Geist Mono may be proprietary — safe free fallback: JetBrains Mono (Google Fonts).

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

## Radius
- base: 0px
- button: 0px

## Primary button
- bg `#737373` · text `#FAFAFA` · radius 0px

## 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.

---

> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/ds/mono-ui

Export: Tailwind v4 (@theme)

@theme {
  /* action color #737373 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FFFFFF;
  --color-surface: #F0F0F0;
  --color-border: #DADADA;
  --color-text: #0A0A0A;
  --color-text-muted: #676767;
  --color-primary: #737373;  /* primary brand / action color. */
  --color-accent: #737373;  /* THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed. */
  --color-link: #737373;  /* inline text links — shares the action color. */
  --color-button-bg: #737373;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FAFAFA;
  /* fonts: Geist Mono may be proprietary — safe free fallback: JetBrains Mono (Google Fonts). */
  --font-heading: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --text-h1: 36px;
  --text-h2: 24px;
  --text-body: 14px;
  --radius-base: 0px;
  --radius-button: 0px;
  --spacing-1: 2px;
  --spacing-2: 4px;
  --spacing-3: 6px;
  --spacing-4: 8px;
  --spacing-5: 12px;
  --spacing-6: 16px;
  --spacing-7: 24px;
  --spacing-8: 32px;
}

Export: CSS variables

:root {
  /* action color #737373 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FFFFFF;
  --surface: #F0F0F0;
  --border: #DADADA;
  --text: #0A0A0A;
  --text-muted: #676767;
  --primary: #737373;  /* primary brand / action color. */
  --accent: #737373;  /* THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed. */
  --link: #737373;  /* inline text links — shares the action color. */
  --button-bg: #737373;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FAFAFA;
  --font-heading: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-body: "Geist Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --radius: 0px;
  --radius-button: 0px;
}
/* fonts: Geist Mono may be proprietary — safe free fallback: JetBrains Mono (Google Fonts). */