E2B — Design System

light · modern · medium · custom · confidence 92%

The full decoded design system for E2B: color roles, type scale, spacing, radii and paste-ready DESIGN.md / Tailwind / CSS exports.

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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/e2b.

Tokens

E2B's decoded design system: background #FAFAFA, text #000000, accent #3898EC, link #3898EC, primary #0000EE; type scale h1 64px / h2 60px / body 14px; 4px spacing base; 0px base radius. The single interactive/action color is #000000 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #000000 — the single interactive color; only on things you click or must notice, never large fills.
• accent, link are all #3898EC — one role, not several (the action color).
• accent #3898EC — accent for emphasis — keep it rare on the page.
• primary #0000EE — a brand color — but the call-to-action uses #000000, not this.
• secondary #FF8800 — 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: IBM Plex Sans
• Body: IBM Plex Sans
• Mono: IBM Plex Mono
• h1: 64px
• h2: 60px
• body: 14px

Spacing

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

Radii

• base: 0px
• button: 0px

Per-section tokens (11)

• Hero
• Logo Wall
• Feature
• Feature
• Feature
• Feature
• Feature
• Gallery / Showcase
• Testimonial / Social Proof
• CTA / Sign-up
• Footer

Export: DESIGN.md

# E2B — Design System

> light, modern, medium, custom

## Colors

| Role | Value |
|------|-------|
| bg | `#FAFAFA` |
| surface | `#EBEBEB` |
| border | `#D4D4D4` |
| text | `#000000` |
| text_muted | `#5F5F5F` |
| primary | `#0000EE` |
| accent | `#3898EC` |
| link | `#3898EC` |
| secondary | `#FF8800` |
| button_bg | `#000000` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#000000` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `accent`, `link` are all `#3898EC` — one role, not several.
- **accent** `#3898EC` — accent for emphasis — keep it rare on the page.
- **primary** `#0000EE` — a brand color — but the call-to-action uses #000000, not this.
- **secondary** `#FF8800` — 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: **IBM Plex Sans**
- Body: **IBM Plex Sans**
- Mono: **IBM Plex Mono**
- h1: 64px
- h2: 60px
- body: 14px

> **Fonts —** IBM Plex Sans — free, on Google.

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

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

## Primary button
- bg `#000000` · text `#FFFFFF` · 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.

Export: Tailwind v4 (@theme)

@theme {
  /* action color #000000 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FAFAFA;
  --color-surface: #EBEBEB;
  --color-border: #D4D4D4;
  --color-text: #000000;
  --color-text-muted: #5F5F5F;
  --color-primary: #0000EE;  /* a brand color — but the call-to-action uses #000000, not this. */
  --color-accent: #3898EC;  /* accent for emphasis — keep it rare on the page. */
  --color-link: #3898EC;  /* fails contrast on the background (~2.9:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --color-secondary: #FF8800;  /* 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: #000000;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* fonts: IBM Plex Sans — free, on Google. */
  --font-heading: "IBM Plex Sans", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --text-h1: 64px;
  --text-h2: 60px;
  --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 #000000 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FAFAFA;
  --surface: #EBEBEB;
  --border: #D4D4D4;
  --text: #000000;
  --text-muted: #5F5F5F;
  --primary: #0000EE;  /* a brand color — but the call-to-action uses #000000, not this. */
  --accent: #3898EC;  /* accent for emphasis — keep it rare on the page. */
  --link: #3898EC;  /* fails contrast on the background (~2.9:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --secondary: #FF8800;  /* 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: #000000;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --font-heading: "IBM Plex Sans", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --radius: 0px;
  --radius-button: 0px;
}
/* fonts: IBM Plex Sans — free, on Google. */