Mercury

Business banking for startups and growing companies

The style

A calm, premium banking language. Soft off-white pages alternate with deep blue-black bands, headlines are set in a quiet, even-weight sans, and a single periwinkle-indigo pill carries every action. Imagery does the emotional work while the interface stays understated, spacious and precise.

Colours

Brand#585eeb
Buttons#585eeb
Highlight#d5792a
Background#fbfaf7
Text#1e1e2a

Click a colour to copy it.

Fonts

Plus Jakarta Sans

For headings

Plus Jakarta Sans

For everything else

Free fonts that look like Mercury’s own, so you can use them anywhere.

Buttons

Get startedContinueCancel

40px indigo pills with white labels for the main action; quiet text links elsewhere.

Use this style in your project

Pick the way that suits you. The first one needs no design or coding knowledge.

With an AI tool

Your AI tool builds the page for you, in Mercury’s style.

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2. Open it in

For developers

Ready-made CSS variables, a Tailwind theme and design tokens, with light and dark modes.

See the code

Make it your own

Change the colours, fonts and shapes, and see the result straight away before you use it.

Customise

Files

The code, ready to copy

Every file says where the style came from.

tokens.css — Colours, fonts and sizes as CSS variables, with light and dark modes.

/* Night Ledger — design tokens generated by Markdown */
/* Derived from an analysis of mercury.com; how different from the source: a little different (30/100). */
/* Inspired by, not a copy of, the source. Adapt before commercial use; no logos, imagery, copy or proprietary fonts are included. */

:root {
  color-scheme: light;
  --color-background: #fbfaf7;
  --color-surface: #ffffff;
  --color-surface-muted: #f0efed;
  --color-text: #1e1e2a;
  --color-text-muted: #6d6d73;
  --color-border: #e6e6ec;
  --color-primary: #585eeb;
  --color-on-primary: #ffffff;
  --color-brand: #585eeb;
  --color-on-brand: #ffffff;
  --color-accent: #d5792a;
  --color-success: #127d44;
  --color-warning: #986416;
  --color-danger: #c4271c;
  --font-display: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Space Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --text-display: 3.25rem;
  --text-display-line-height: 1.1;
  --text-display-weight: 500;
  --text-display-tracking: 0em;
  --text-h1: 2.5625rem;
  --text-h1-line-height: 1.13;
  --text-h1-weight: 500;
  --text-h1-tracking: 0em;
  --text-h2: 2.0625rem;
  --text-h2-line-height: 1.16;
  --text-h2-weight: 500;
  --text-h2-tracking: 0em;
  --text-h3: 1.625rem;
  --text-h3-line-height: 1.22;
  --text-h3-weight: 500;
  --text-h3-tracking: 0em;
  --text-lead: 1.25rem;
  --text-lead-line-height: 1.5;
  --text-lead-weight: 400;
  --text-lead-tracking: -0.005em;
  --text-body: 1rem;
  --text-body-line-height: 1.6;
  --text-body-weight: 400;
  --text-body-tracking: 0em;
  --text-small: 0.8125rem;
  --text-small-line-height: 1.5;
  --text-small-weight: 400;
  --text-small-tracking: 0.005em;
  --text-caption: 0.6875rem;
  --text-caption-line-height: 1.4;
  --text-caption-weight: 400;
  --text-caption-tracking: 0.01em;
  --text-label: 0.8125rem;
  --text-label-line-height: 1.3;
  --text-label-weight: 600;
  --text-label-tracking: 0.01em;
  --text-code: 0.875rem;
  --text-code-line-height: 1.55;
  --text-code-weight: 400;
  --text-code-tracking: 0em;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 32px;
  --space-6: 40px;
  --space-7: 64px;
  --space-8: 80px;
  --space-9: 120px;
  --space-10: 160px;
  --radius-none: 0px;
  --radius-sm: 5px;
  --radius-md: 10px;
  --radius-lg: 15px;
  --radius-xl: 25px;
  --radius-full: 9999px;
  --border-width: 1px;
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
  --duration-fast: 190ms;
  --duration-base: 320ms;
  --duration-slow: 550ms;
  --ease-standard: cubic-bezier(0, 0, 0.2, 1);
  --ease-enter: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-exit: cubic-bezier(0.7, 0, 0.84, 0);
  --container: 1400px;
  --gutter: 24px;
  --button-radius: 9999px;
  --button-padding: 10px 20px;
  --input-radius: 10px;
  --input-height: 48px;
  --card-radius: 12px;
  --card-padding: 24px;
  --badge-radius: 9999px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --color-background: #161410;
    --color-surface: #22201c;
    --color-surface-muted: #272521;
    --color-text: #f0eeea;
    --color-text-muted: #9d9b97;
    --color-border: #42403c;
    --color-primary: #585eeb;
    --color-on-primary: #ffffff;
    --color-brand: #585eeb;
    --color-on-brand: #ffffff;
    --color-accent: #df995d;
    --color-success: #55e799;
    --color-warning: #e6a84c;
    --color-danger: #e8685e;
  }
}

[data-theme="dark"] {
  color-scheme: dark;
  --color-background: #161410;
  --color-surface: #22201c;
  --color-surface-muted: #272521;
  --color-text: #f0eeea;
  --color-text-muted: #9d9b97;
  --color-border: #42403c;
  --color-primary: #585eeb;
  --color-on-primary: #ffffff;
  --color-brand: #585eeb;
  --color-on-brand: #ffffff;
  --color-accent: #df995d;
  --color-success: #55e799;
  --color-warning: #e6a84c;
  --color-danger: #e8685e;
}

@media (prefers-reduced-motion: reduce) {
  :root { --duration-fast: 0ms; --duration-base: 0ms; --duration-slow: 0ms; }
}

See every detail

Buttons

Inputs

Email address

Badges

New ActivePendingOverdue

Project

Quarterly field notes

Draft

A card groups one idea: a title, one line of support and a clear next step.

Updated 2h agoOpen project

Weekly digest is ready

Three new comments and one approval.

npm i @brandless/ui

Colour

Semantic roles for light mode. Contrast is checked against WCAG AA as you edit.

Background
Surface
Surface muted
AA 15.8:1
Text
AA 4.9:1
Text muted
Border
AA 4.8:1
Primary
AA 5.0:1
On primary
Brand
AA 5.0:1
On brand
AA 3.0:1
Accent
AA 5.0:1
Success
AA 4.8:1
Warning
AA 5.5:1
Danger

Typography

Base 16px on a 1.268 modular scale. Only open-licence fonts are recommended.

display

Plus Jakarta Sans

Open alternative to arcadiaDisplay

body

Plus Jakarta Sans

Open alternative to arcadia

mono

Ag
Space Mono

Suggested

display · 52px / 1.1 · 500 · 0em
The quiet grammar of form
h1 · 41px / 1.13 · 500 · 0em
The quiet grammar of form
h2 · 33px / 1.16 · 500 · 0em
The quiet grammar of form
h3 · 26px / 1.22 · 500 · 0em
The quiet grammar of form
lead · 20px / 1.5 · 400 · -0.005em
Readable text sets the pace of an interface.
body · 16px / 1.6 · 400 · 0em
Readable text sets the pace of an interface.
small · 13px / 1.5 · 400 · 0.005em
Readable text sets the pace of an interface.
caption · 11px / 1.4 · 400 · 0.01em
Readable text sets the pace of an interface.
label · 13px / 1.3 · 600 · 0.01em
Readable text sets the pace of an interface.
code · 14px / 1.55 · 400 · 0em
const tokens = await load();

Spacing

A 8px base unit. Use the scale for padding, gaps and section rhythm.

4px
8px
12px
16px
32px
40px
64px
80px
120px
160px

Shape & surface

Flat, paper-like planes separated by fine rules instead of elevation.

Radii

none
0px
sm
5px
md
10px
lg
15px
xl
25px
full
pill

Shadows & borders

shadow-sm

none

shadow-md

none

shadow-lg

none

Borders: 1px hairline · Surfaces: paper

Layout

1400px container · 12 columns · 24px gutters

Patterns

Wide single-column hero with generous vertical rhythm between sections.
Twelve-column grid; content blocks usually span 4, 6 or 8 columns.
Full-bleed bands for feature sections, inner content capped at the container.
Reading text limited to roughly 65–72 characters per line.

Responsive principles

Below md, grids collapse to a single column and side gutters drop to 16px.
Type steps above h2 scale down one step on small screens.
Navigation collapses to a disclosure menu below lg.
Touch targets stay at least 44×44px on every breakpoint.

Motion

Durations and easing curves. Previews respect your reduced-motion setting.

fast
190ms
base
320ms
slow
550ms

ease-standard
ease-enter
ease-exit

Principles

Motion is measured and calm, easing into place rather than snapping.
Animate opacity and transform only; avoid animating layout.
Respect prefers-reduced-motion by replacing movement with instant state changes or fades.

Mercury, its logo and trademarks belong to their owner and are shown only to say where this style comes from. This is our own study of their public website — not made or endorsed by Mercury. Use your own words and images.

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The style

Colours

Fonts

Buttons

Use this style in your project

With an AI tool

For developers

Make it your own

Quarterly field notes

Radii

Shadows & borders

Patterns

Responsive principles

Principles

More like Mercury

Superpower

Vercel

Linear