---
version: alpha
name: Expo
description: Light design system extracted from expo.dev (DOM-true values, Emblematic extractor 0.2.0, 2026-11-12).
colors:
  background: "#FFFFFF"
  on-surface: "#1C2024"
  on-surface-variant: "#60646C"
  primary: "#0D74CE"
  outline: "#E0E1E6"
  expo-color-black: "#000000"
  color-7: "#F9F9FBB8"
  slate-9: "#8B8D98"
  color-9: "#2788F3"
  color-10: "#F76809"
  slate-3: "#F0F0F3"
  color-12: "#F9F9FBCC"
  background-dark: "#111113"
  on-surface-dark: "#EDEEF0"
  on-surface-variant-dark: "#B0B4BA"
  primary-dark: "#70B8FF"
  outline-dark: "#2E3135"
typography:
  display-lg:
    fontFamily: Inter
    fontSize: 48px
    fontWeight: 600
    lineHeight: 1.1
    letterSpacing: -0.025em
  title-md:
    fontFamily: Inter
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.4
  body-md:
    fontFamily: Inter
    fontSize: 16px
    fontWeight: 500
    lineHeight: 1.4
  body-sm:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.4
  label-md:
    fontFamily: Inter
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.625
  mono-md:
    fontFamily: JetBrains Mono
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.6
rounded:
  sm: 16px
  md: 25px
  lg: 40px
  full: 9999px
spacing:
  xxs: 4px
  xs: 6px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 24px
  2xl: 32px
  3xl: 40px
  4xl: 48px
  5xl: 56px
  6xl: 64px
  base: 8px
  container: 1328px
components:
  button-primary:
    backgroundColor: "{colors.expo-color-black}"
    textColor: "{colors.background}"
    rounded: "{rounded.full}"
    padding: 0px
    height: 36px
    typography: "{typography.label-md}"
  button-secondary:
    textColor: "{colors.on-surface}"
    rounded: "{rounded.full}"
    padding: 4px
    height: 32px
    typography: "{typography.label-md}"
  card:
    backgroundColor: "{colors.background}"
    rounded: "{rounded.sm}"
    padding: 32px
---

# Expo

> Extracted from [https://expo.dev/](https://expo.dev/) on 2026-11-12 by Emblematic. Every value below was read from the rendered DOM (computed styles, `document.fonts`, and the fonts Chrome actually used to paint text), not estimated from pixels. When the YAML front matter and this prose disagree, the YAML wins. Copy values from this file exactly; don't transcribe them from memory. Don't copy logos, imagery, illustrations or marketing copy.

## Overview

Expo uses a light canvas (#FFFFFF) with a palette led by #0D74CE. Type is set in **Inter** (display + body), **JetBrains Mono** (mono), with 16px body text. Layout: 1328px container, none-detected navigation, 8 sections. Built with next.js, tailwind, sanity, google-tag-manager, cloudflare.

## Colors

Area-weighted from painted backgrounds, text and borders on the 1440px light capture. Roles are inferred from usage (largest background, most text, interactive fills). Every hex is an exact computed value; a role marked *unverified* is a best guess that has not passed review, so its canonical token (e.g. `primary`) is left out of the front matter.

| Token | Hex | OKLCH | Role | Share of paint | CSS variable |
|---|---|---|---|---|---|
| `background` | `#FFFFFF` | 1 0 0 | bg | 87.2% | `--expo-theme-background-default` |
| `on-surface` | `#1C2024` | 0.241 0.01 248.2 | text | 6.3% | `--expo-theme-text-default` |
| `on-surface-variant` | `#60646C` | 0.502 0.014 264.4 | muted | 2.1% | `--expo-theme-text-secondary` |
| `primary` | `#0D74CE` | 0.556 0.162 252.2 | accent | 0.42% | `--expo-theme-text-link` |
| `outline` | `#E0E1E6` | 0.91 0.007 277.2 | border | 0.25% | `--expo-theme-border-secondary` |
| `expo-color-black` | `#000000` | 0 0 0 | other | 1.2% | `--expo-color-black` |
| `color-7` | `#F9F9FBB8` (on bg `#FBFBFC`) | 0.983 0.003 286.4 | other | 0.48% | — |
| `slate-9` | `#8B8D98` | 0.645 0.016 277.7 | other | 0.35% | `--slate-9` |
| `color-9` | `#2788F3` | 0.629 0.182 254.6 | other | 0.54% | — |
| `color-10` | `#F76809` | 0.686 0.194 44.8 | other | 0.21% | — |
| `slate-3` | `#F0F0F3` | 0.956 0.004 286.3 | other | 0.18% | `--slate-3` |
| `color-12` | `#F9F9FBCC` (on bg `#FAFAFC`) | 0.983 0.003 286.4 | other | 0.04% | — |

Sparse chromatic highlights (not accents): `#0090FF` (`--blue-9`).

Declared brand/accent tokens: `--expo-theme-button-primary-destructive-background` = `#DC3E42` (declared, not painted on this page).

Contrast: text on background 16.39:1, muted text 5.94:1, accent 4.77:1.

Gradients in use: `linear-gradient(rgba(0, 0, 0, 0) 0%, color(srgb 0.976471 0.976471 0.984314 / 0.72) 58%, rgb(249, 249, 251) 100%)`; `linear-gradient(to top in oklab, rgb(255, 255, 255) 0%, rgba(0, 0, 0, 0) 100%)`.

The site responds to `prefers-color-scheme: dark`; the `-dark` tokens hold the dark-mode roles.

## Typography

| Family | Role | Weights | Share of text | Source |
|---|---|---|---|---|
| **Inter** | display, body | 400, 500, 600 | 98.9% | webfont |
| **JetBrains Mono** | mono | 400, 600 | 1.0% | webfont |

Scale (px): 12, 14, 16, 24, 32, 48, 64. Effective ratio ≈ 1.414 (close to a augmented fourth). Body 16px at line-height 1.4; display 48px with tracking -0.025em. Headings are sentence case. On a 390px viewport the body is 16px and display 48px.

## Layout

Spacing follows a 8px base unit; the most used steps are 4, 6, 8, 12, 16, 24, 32, 40, 48, 56, 64px. Sections open with about 128px of space before their first line of text. Content sits in a 1328px container on a 2-column grid. Text density 0.082 (text area / page area).

Section order (desktop). Kinds below the review threshold are shown as *section*:

1. **hero** (656px, bg #FFFFFF)
2. **logos** — “Powering AI-native app devs” (1458px, bg #FFFFFF)
3. **section** — “Infrastructure for your apps” (2000px, bg #FFFFFF)
4. **section** — “and observability Built-in monitoring” (1683px, bg #FFFFFF)
5. **section** (749px, bg #FFFFFF)
6. **section** — “Expo is a community” (1444px, bg #FFFFFF)
7. **logos** — “Build beautiful native apps” (704px, bg #FFFFFF)
8. **footer** — “Legal” (525px, bg #FFFFFF)

## Elevation & Depth

Style: elevated. Most used shadows:

- `rgba(0, 0, 0, 0.1) 0px 10px 20px 0px, rgba(0, 0, 0, 0.05) 0px 3px 6px 0px`
- `rgba(0, 0, 0, 0.05) 0px 5px 10px 0px, rgba(0, 0, 0, 0.12) 0px 15px 25px 0px`
- `rgba(0, 0, 0, 0.08) 0px 3px 6px 0px, rgba(0, 0, 0, 0.07) 0px 2px 4px 0px`

## Shapes

Dominant corner radius 16px; radii in use: 16px, 25px, 40px, pill. Borders: hairline (1px).

## Components

- **button-primary**: backgroundColor `#000000`, textColor `#FFFFFF`, rounded `9999px`, padding `0px 16px`, height `36px`, fontFamily `Inter`, fontSize `14px`, fontWeight `500`
- **button-secondary**: textColor `#1C2024`, rounded `9999px`, padding `4px 10px`, height `32px`, fontFamily `Inter`, fontSize `16px`, fontWeight `400`, border `1px solid #D9D9E0`
- **card**: rounded `16px`, padding `32px`, backgroundColor `#FFFFFF`, border `1px solid #E0E1E6`

## Do's and Don'ts

- Do reserve `#0D74CE` for primary actions and highlights; it covers only 0.42% of the painted page.
- Do set body copy in Inter at 16px / 1.4.
- Do tighten large headlines (-0.025em at 48px).
- Don't introduce font weights beyond 400, 500, 600.
- Do keep corners at 16px for most controls, and use the larger radii only for cards and media.
- Do snap spacing to multiples of 8px.
- Don't copy this site's logos, illustrations, photography or copy; use the system, not the brand assets.

## Provenance

Spec v2, extractor 0.2.0. Render quality: **ok**. Vision pass: not run. Fields below confidence 0.7 are hedged or left out above: `color.accent_strategy`, `layout.columns`, `layout.hero`, `layout.section_count`, `sections[].kind`, `space.section_padding_px`. Full per-field provenance is in `spec.json`.