---
version: alpha
name: Mercury
description: Dark design system extracted from mercury.com (DOM-true values, Emblematic extractor 0.2.0, 2026-11-12).
colors:
  background: "#171721"
  on-surface: "#EDEDF3"
  surface: "#1E1E2A"
  on-surface-variant: "#C3C3CC"
  primary: "#5266EB"
  outline: "#AFB2CE5C"
  color-7: "#00000099"
  color-8: "#0000004D"
  purple-magic-400-alpha-3: "#9CB4E833"
  neutral-magic-400-alpha-3: "#AFB2CE33"
  neutral-magic-600-alpha-3: "#7073931A"
  on-primary: "#FFFFFF"
typography:
  display-lg:
    fontFamily: Arcadia Display
    fontSize: 65.34px
    fontWeight: 480
    lineHeight: 1.1
  headline-md:
    fontFamily: Arcadia
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.4
    letterSpacing: 0.02em
  body-md:
    fontFamily: Arcadia
    fontSize: 18px
    fontWeight: 360
    lineHeight: 1.35
  label-md:
    fontFamily: Arcadia
    fontSize: 16px
    fontWeight: 420
    lineHeight: 1
rounded:
  sm: 4px
  md: 12px
  full: 9999px
spacing:
  xxs: 2px
  xs: 4px
  sm: 8px
  md: 12px
  lg: 16px
  xl: 20px
  2xl: 24px
  3xl: 32px
  4xl: 40px
  5xl: 72px
  6xl: 128px
  base: 4px
  container: 1024px
components:
  button-primary:
    backgroundColor: "{colors.primary}"
    textColor: "#FFFFFF"
    rounded: "{rounded.full}"
    padding: 0px
    height: 40px
    typography: "{typography.label-md}"
  button-secondary:
    textColor: "{colors.on-surface}"
    rounded: "{rounded.full}"
    padding: 0px
    height: 40px
    typography: "{typography.label-md}"
  card:
    backgroundColor: "{colors.surface}"
    rounded: "{rounded.md}"
    padding: 32px
  input:
    rounded: 32px
    padding: 0px
    height: 46px
---

# Mercury

> Extracted from [https://mercury.com/](https://mercury.com/) 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

Mercury uses a dark canvas (#171721) with a palette led by #5266EB. Type is set in **Arcadia**, **Arcadia Display** (display), with 18px body text. Layout: 1024px container, top-static navigation, 8 sections. Built with next.js, tailwind, radix-ui, segment, vercel.

## 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` | `#171721` | 0.209 0.02 284.6 | bg | 82.9% | `--color-neutral-base-950` |
| `on-surface` | `#EDEDF3` | 0.948 0.008 286.2 | text | 6.5% | `--text-default-inverted` |
| `surface` | `#1E1E2A` | 0.241 0.023 284.6 | surface | 4.8% | `--surface-inverted` |
| `on-surface-variant` | `#C3C3CC` | 0.82 0.012 286.1 | muted | 4.3% | `--text-subdued-inverted` |
| `primary` | `#5266EB` | 0.57 0.2 272 | accent | 0.14% | `--icon-primary` |
| `outline` | `#AFB2CE5C` (on bg `#4E4F5F`) | 0.77 0.04 280.6 | border | 0.04% | `--color-neutral-magic-400-alpha-5` |
| `color-7` | `#00000099` (on bg `#09090D`) | 0 0 0 | other | 0.43% | — |
| `color-8` | `#0000004D` (on bg `#101017`) | 0 0 0 | other | 0.43% | — |
| `purple-magic-400-alpha-3` | `#9CB4E833` (on bg `#323649`) | 0.771 0.079 265.3 | other | 0.18% | `--color-purple-magic-400-alpha-3` |
| `neutral-magic-400-alpha-3` | `#AFB2CE33` (on bg `#353644`) | 0.77 0.04 280.6 | other | 0.17% | `--color-neutral-magic-400-alpha-3` |
| `neutral-magic-600-alpha-3` | `#7073931A` (on bg `#20202C`) | 0.565 0.049 280.5 | other | 0.04% | `--color-neutral-magic-600-alpha-3` |

Contrast: text on background 15.25:1, muted text 10.16:1, accent 3.78:1.

Gradients in use: `linear-gradient(rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.3) 40%, rgba(0, 0, 0, 0) 100%)`.

The site does not change under `prefers-color-scheme: dark`.

## Typography

| Family | Role | Weights | Share of text | Source |
|---|---|---|---|---|
| **Arcadia** (CSS: `arcadia`) | body | 360, 400, 420, 480, 700 | 67.5% | webfont |
| **Arcadia Display** (CSS: `arcadiaDisplay`) | display | 360, 480 | 32.5% | webfont |

Declared in `@font-face` but not used to paint text on this page: IBM Plex Mono, Tiempos, Tiempos Fine, Tiempos Headline. Don't treat these as the page's fonts.

Scale (px): 12, 16, 18, 21, 24, 28, 32, 42. Effective ratio ≈ 1.185 (close to a minor third). Body 18px at line-height 1.35; display 65.34px with tracking 0em. Headings are sentence case. On a 390px viewport the body is 14px and display 36px.

## Layout

Spacing follows a 4px base unit; the most used steps are 2, 4, 8, 12, 16, 20, 24, 32, 40, 72, 128px. Sections open with about 152px of space before their first line of text. Content sits in a 1024px container on a 16-column grid. Text density 0.097 (text area / page area).

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

1. **nav** (72px, bg #171721)
2. **hero** — “Radically different banking” (1800px, bg #171721)
3. **testimonials** — “Loved by + of the most ambitious entrepreneurs on the planet 450K” (2602px, bg #171721)
4. **section** — “Tackle banking tasks in seconds” (2489px, bg #171721)
5. **section** — “You’re creating something to stand the test of time. So are we.” (1193px, bg #171721)
6. **section** — “Mercury hits $5.2B valuation” (621px, bg #171721)
7. **section** — “Mercury for personal” (1704px, bg #171721)
8. **footer** — “Disclaimers and footnotes” (1225px, bg #171721)

## Elevation & Depth

Style: flat. Most used shadows:

- `rgba(0, 0, 0, 0.05) 0px 0px 3px 0px, rgba(0, 0, 0, 0.05) 0px 8px 12px 0px, rgba(0, 0, 0, 0.05) 0px 12px 20px 0px`

## Shapes

Dominant corner radius is a full pill; radii in use: 4px, 12px, pill. Borders: hairline (1px).

## Components

- **button-primary**: backgroundColor `#5266EB`, textColor `#FFFFFF`, rounded `9999px`, padding `0px 20px`, height `40px`, fontFamily `Arcadia`, fontSize `16px`, fontWeight `420` (e.g. “Open account”)
- **button-secondary**: textColor `#EDEDF3`, rounded `9999px`, padding `0px 20px`, height `40px`, fontFamily `Arcadia`, fontSize `16px`, fontWeight `420`, border `1px solid #AFB2CE5C` (e.g. “Launch demo”)
- **card**: rounded `12px`, padding `32px`, backgroundColor `#1E1E2A`
- **input**: rounded `32px`, height `46px`, padding `0px 0px`

## Do's and Don'ts

- Do reserve `#5266EB` for primary actions and highlights; it covers only 0.14% of the painted page.
- Do set body copy in Arcadia at 18px / 1.35.
- Do use Arcadia Display only for display sizes, not for body text.
- Don't introduce font weights beyond 360, 400, 420, 480, 700.
- Don't add drop shadows; depth comes from tone and borders.
- Do keep corners at pill for most controls, and use the larger radii only for cards and media.
- Do snap spacing to multiples of 4px.
- 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`.