MozaikaDesign system

Builder.io — Design System

dark · modern · high · custom · confidence 92%

Builder.io codes its brand in Geist: 56px/500 warm-white headlines on #0A0A0A, 15px body, and the signature move — cyan #01C8F1 buttons labeled in Geist Mono caps like terminal commands (START BUILDING). Agent chat panels and visual editor frames do the demoing; an AI page-builder whose own page reads like a well-linted codebase.

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/builder-io.

Tokens

Builder.io's decoded design system: background #0A0A0A, text #FAF9F5, accent #01C8F1, link #4ADE80, primary #01C8F1; type scale h1 56px / h2 46px / body 16px; 4px spacing base; 4px base radius. The single interactive/action color is #01C8F1 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#0A0A0A
surface#181818
border#2E2D2D
text#FAF9F5
text_muted#9E9E9B
primary#01C8F1
accent#01C8F1
link#4ADE80
secondary#BEF0F5
button_bg#01C8F1
button_text#0A0A0A

Using these colors

Typography

Spacing

Radii

Per-section tokens (12)

Export: DESIGN.md

# Builder.io — Design System

> dark, modern, high, custom

Builder.io codes its brand in Geist: 56px/500 warm-white headlines on #0A0A0A, 15px body, and the signature move — cyan #01C8F1 buttons labeled in Geist Mono caps like terminal commands (START BUILDING). Agent chat panels and visual editor frames do the demoing; an AI page-builder whose own page reads like a well-linted codebase.

## Colors

| Role | Value |
|------|-------|
| bg | `#0A0A0A` |
| surface | `#181818` |
| border | `#2E2D2D` |
| text | `#FAF9F5` |
| text_muted | `#9E9E9B` |
| primary | `#01C8F1` |
| accent | `#01C8F1` |
| link | `#4ADE80` |
| secondary | `#BEF0F5` |
| button_bg | `#01C8F1` |
| button_text | `#0A0A0A` |

**Using these colors**

- **Action color** `#01C8F1` — 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`, `button_bg` are all `#01C8F1` — one role, not several (your action color).
- **accent** `#01C8F1` — 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** `#4ADE80` — inline text links and link-styled controls.
- **secondary** `#BEF0F5` — 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: **Geist**
- Body: **Poppins**
- Mono: **Geist Mono**
- h1: 56px
- h2: 46px
- body: 16px

> **Fonts —** Geist — free, on Google. Poppins — free, on Google.

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

## Radius
- base: 4px
- button: 6px

## Primary button
- bg `#01C8F1` · text `#0A0A0A` · radius 6px

## 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 #01C8F1 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #0A0A0A;
  --color-surface: #181818;
  --color-border: #2E2D2D;
  --color-text: #FAF9F5;
  --color-text-muted: #9E9E9B;
  --color-primary: #01C8F1;  /* primary brand / action color. */
  --color-accent: #01C8F1;  /* 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: #4ADE80;  /* inline text links and link-styled controls. */
  --color-secondary: #BEF0F5;  /* 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. */
  --color-button-bg: #01C8F1;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #0A0A0A;
  /* fonts: Geist — free, on Google. Poppins — free, on Google. */
  --font-heading: "Geist", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Poppins", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;
  --text-h1: 56px;
  --text-h2: 46px;
  --text-body: 16px;
  --radius-base: 4px;
  --radius-button: 6px;
  --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 #01C8F1 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #0A0A0A;
  --surface: #181818;
  --border: #2E2D2D;
  --text: #FAF9F5;
  --text-muted: #9E9E9B;
  --primary: #01C8F1;  /* primary brand / action color. */
  --accent: #01C8F1;  /* 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: #4ADE80;  /* inline text links and link-styled controls. */
  --secondary: #BEF0F5;  /* 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. */
  --button-bg: #01C8F1;  /* primary-button fill — the main call-to-action color. */
  --button-text: #0A0A0A;
  --font-heading: "Geist", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Poppins", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "Geist Mono", ui-monospace, monospace;
  --radius: 4px;
  --radius-button: 6px;
}
/* fonts: Geist — free, on Google. Poppins — free, on Google. */