MozaikaDesign system

Resend — Design System

dark · modern · medium · tailwind · confidence 92%

Resend is black-tie developer marketing: a true-black canvas, #F0F0F0 ink, and typography doing all the theatrics — Domaine Display serif at 96px for the headline moment, ABC Favorit at 56 for section voices, Inter at 14 for the working text. Buttons are quiet ghosts (transparent fills, 16px radius) because the cinematic 3D cube and the light-beam gradients carry the drama. Spacing is patient and editorial; color appears as light, not paint. It feels like an email API shot by a film studio.

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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/resend.

Tokens

Resend's decoded design system: background #000000, text #FFFFFF, accent #00A3FF, link #3B9EFF, primary #00A3FF; type scale h1 96px / h2 56px / body 14px; 4px spacing base; 4px base radius. The single interactive/action color is #00A3FF — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#000000
surface#0F0F0F
border#262626
text#FFFFFF
text_muted#9E9E9E
primary#00A3FF
accent#00A3FF
link#3B9EFF
secondary#4983C2
button_bg#00A3FF
button_text#FFFFFF

Using these colors

Typography

Spacing

Radii

Per-section tokens (17)

Export: DESIGN.md

# Resend — Design System

> dark, modern, medium, tailwind

Resend is black-tie developer marketing: a true-black canvas, #F0F0F0 ink, and typography doing all the theatrics — Domaine Display serif at 96px for the headline moment, ABC Favorit at 56 for section voices, Inter at 14 for the working text. Buttons are quiet ghosts (transparent fills, 16px radius) because the cinematic 3D cube and the light-beam gradients carry the drama. Spacing is patient and editorial; color appears as light, not paint. It feels like an email API shot by a film studio.

## Colors

| Role | Value |
|------|-------|
| bg | `#000000` |
| surface | `#0F0F0F` |
| border | `#262626` |
| text | `#FFFFFF` |
| text_muted | `#9E9E9E` |
| primary | `#00A3FF` |
| accent | `#00A3FF` |
| link | `#3B9EFF` |
| secondary | `#4983C2` |
| button_bg | `#00A3FF` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#00A3FF` — 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 `#00A3FF` — one role, not several (your action color).
- **accent** `#00A3FF` — 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** `#3B9EFF` — inline text links and link-styled controls.
- **secondary** `#4983C2` — 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: **Domaine Display** _(free fallback: Newsreader)_
- Body: **Inter**
- h1: 96px
- h2: 56px
- body: 14px

> **Fonts —** Domaine Display may be proprietary — safe free fallback: Newsreader (Google Fonts). Inter — free, on Google.

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

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

## Primary button
- bg `#00A3FF` · text `#FFFFFF` · radius 4px

## 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 #00A3FF — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #000000;
  --color-surface: #0F0F0F;
  --color-border: #262626;
  --color-text: #FFFFFF;
  --color-text-muted: #9E9E9E;
  --color-primary: #00A3FF;  /* primary brand / action color. */
  --color-accent: #00A3FF;  /* 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: #3B9EFF;  /* inline text links and link-styled controls. */
  --color-secondary: #4983C2;  /* 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: #00A3FF;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* fonts: Domaine Display may be proprietary — safe free fallback: Newsreader (Google Fonts). Inter — free, on Google. */
  --font-heading: "Domaine Display", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-h1: 96px;
  --text-h2: 56px;
  --text-body: 14px;
  --radius-base: 4px;
  --radius-button: 4px;
  --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 #00A3FF — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #000000;
  --surface: #0F0F0F;
  --border: #262626;
  --text: #FFFFFF;
  --text-muted: #9E9E9E;
  --primary: #00A3FF;  /* primary brand / action color. */
  --accent: #00A3FF;  /* 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: #3B9EFF;  /* inline text links and link-styled controls. */
  --secondary: #4983C2;  /* 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: #00A3FF;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --font-heading: "Domaine Display", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --radius: 4px;
  --radius-button: 4px;
}
/* fonts: Domaine Display may be proprietary — safe free fallback: Newsreader (Google Fonts). Inter — free, on Google. */