MozaikaDesign system

Brex — Design System

light · modern · high · custom · confidence 92% · deep decode

Brex runs corporate finance in disciplined Inter: 72px/500 'Finance built for speed and control' in near-black #15191E, 20px standfirsts in grey, 10px-radius quiet buttons, and card products photographed like hardware. The restraint is deliberate — a fintech serving CFOs dresses in the typography of an audited financial statement.

Open in Mozaika →

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/brex.

Tokens

Brex's decoded design system: background #FFFFFF, text #15191E, accent #FF5900, link #FF6B18, primary #FF5900; type scale h1 72px / h2 20px / body 16px; 8px spacing base; 10px base radius. The single interactive/action color is #FF5900 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

RoleValue
bg#FFFFFF
surface#F0F1F1
border#DBDCDD
text#15191E
text_muted#6D7073
primary#FF5900
accent#FF5900
link#FF6B18
secondary#FF3D00
button_bg#FF5900
button_text#FCFCFD

Using these colors

Typography

Spacing

Radii

Shadows (elevation)

Motion

Micro-interactions run at 500ms (dominant) with ease-in-out.

Native design tokens

TokenValue
--font-inter'inter', 'inter Fallback'
--font-flecha'flecha', 'flecha Fallback'
--font-bronzea'bronzea', 'bronzea Fallback'
--font-space-mono'Space Mono', 'Space Mono Fallback'

Button states (measured)

Layout (measured)

Input (measured)

height 36px · radius 0px

Responsive (measured)

Per-section tokens (11)

Export: DESIGN.md

# Brex — Design System

> light, modern, high, custom — deep decode (measured live)

Brex runs corporate finance in disciplined Inter: 72px/500 'Finance built for speed and control' in near-black #15191E, 20px standfirsts in grey, 10px-radius quiet buttons, and card products photographed like hardware. The restraint is deliberate — a fintech serving CFOs dresses in the typography of an audited financial statement.

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#F0F1F1` |
| border | `#DBDCDD` |
| text | `#15191E` |
| text_muted | `#6D7073` |
| primary | `#FF5900` |
| accent | `#FF5900` |
| link | `#FF6B18` |
| secondary | `#FF3D00` |
| button_bg | `#FF5900` |
| button_text | `#FCFCFD` |

**Using these colors**

- **Action color** `#FF5900` — 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 `#FF5900` — one role, not several (your action color).
- **accent** `#FF5900` — 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** `#FF6B18` — 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** `#FF3D00` — 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.
- **Page coverage** (full-page screenshot pixels): `#F9F9F9` 73.9% · `#E6E5E4` 10.9% · `#0C1015` 9.9% · `#A3938B` 5.3%

## Typography

- Heading: **Inter**
- Body: **Inter**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 72px / 500 · lh 72px · tracking -1.44px |
| h2 | 48px / 500 · lh 48px · tracking -0.96px |
| h3 | 36px / 500 · lh 36px · tracking -0.72px |
| body | 16px / 400 · lh 24px · tracking -0.32px |
| small | 14px / 500 · lh 21px · tracking -0.28px |

- Weight ladder: 400 · 500 · 600 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** Inter — free, on Google.

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 2px, 4px, 6px, 8px, 12px, 16px, 20px, 24px, 32px, 48px — snap all gaps/padding to these
- section rhythm: 48px top/bottom padding per section (measured)

## Radius
- base: 10px
- button: 10px
- card: 12px
- sharp: 3px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#FF5900` / `#FCFCFD` | 1px solid rgb(255, 89, 0) | 10px | 0px 12px 0px 12px | 400 14px | none |
| secondary | `rgba(0, 0, 0, 0)` / `#15191E` | 1px solid rgba(0, 0, 0, 0) | 10px | 4px 8px 4px 8px | 600 14px / -0.14px | none |

**States (measured, not guessed)**

- primary hover: border `1px solid rgb(255, 106, 23)` · background `#FF6A17`
- primary focus: background `#FF6B18` · outline `1px solid rgb(255, 89, 1)`
- transition: `all 0.5s ease`

## Shadows (elevation)
- subtle: `rgba(66, 87, 138, 0.15) 0px 1px 0px 0px`
- card: `rgba(0, 0, 0, 0.04) 0px 1px 1px 0px`

## Motion
- durations: 500ms (dominant) · 125ms · 200ms
- easings: `ease-in-out` (dominant) · `linear`
- animated properties: box-shadow, border, border-color, undefined

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--font-inter` | `'inter', 'inter Fallback'` |
| `--font-flecha` | `'flecha', 'flecha Fallback'` |
| `--font-bronzea` | `'bronzea', 'bronzea Fallback'` |
| `--font-space-mono` | `'Space Mono', 'Space Mono Fallback'` |

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1300px · common grid: 3-col
- nav: 60px

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 1078 | 208 | — | — | 32/80 | — |
| 1286 | 176 | — | — | 48/16 | — |
| 1462 | 452 | — | — | 48/80 | — |
| 2042 | 545 | 3 | 24 | 48/80 | — |
| 2739 | 486 | — | — | 80/48 | — |
| 3225 | 486 | — | — | 80/48 | — |
| 3710 | 430 | — | — | 24/48 | — |
| 4140 | 470 | — | — | 48/48 | — |

## Components (measured)
- input: h 36px · r 0px · bg rgba(0, 0, 0, 0) · placeholder #6F737B
- link: #FCFCFD · no underline

## Responsive (measured)
- mobile (390px): hero 36px · body 16px · nav: hamburger

## 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.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

---

> **Decoded with Mozaika** — measured live, not guessed. Full decoded design system + one-command install: mozaika.design/ds/brex

Export: Tailwind v4 (@theme)

@theme {
  /* action color #FF5900 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FFFFFF;
  --color-surface: #F0F1F1;
  --color-border: #DBDCDD;
  --color-text: #15191E;
  --color-text-muted: #6D7073;
  --color-primary: #FF5900;  /* primary brand / action color. */
  --color-accent: #FF5900;  /* 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: #FF6B18;  /* 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: #FF3D00;  /* 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: #FF5900;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FCFCFD;
  /* fonts: Inter — free, on Google. */
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  /* measured weights: 400, 500, 600 — use these, not 400/600 */
  --text-hero: 72px; --font-weight-hero: 500; --leading-hero: 72px; --tracking-hero: -1.44px;
  --text-h2: 48px; --font-weight-h2: 500; --leading-h2: 48px; --tracking-h2: -0.96px;
  --text-h3: 36px; --font-weight-h3: 500; --leading-h3: 36px; --tracking-h3: -0.72px;
  --text-body: 16px; --font-weight-body: 400; --leading-body: 24px; --tracking-body: -0.32px;
  --text-small: 14px; --font-weight-small: 500; --leading-small: 21px; --tracking-small: -0.28px;
  --radius-base: 10px;
  --radius-button: 10px;
  --radius-card: 12px;
  --radius-sharp: 3px;
  --shadow-card: rgba(0, 0, 0, 0.04) 0px 1px 1px 0px;
  --shadow-subtle: rgba(66, 87, 138, 0.15) 0px 1px 0px 0px;
  --color-btn-hover: #FF6A17;  /* measured primary hover fill */
  --outline-focus: 1px solid rgb(255, 89, 1);  /* measured focus ring */
  --ease-brand: ease-in-out;
  --duration-fast: 125ms;  /* use: duration-[var(--duration-fast)] */
  --duration-base: 200ms;
  --duration-slow: 500ms;
  --section-y: 48px;  /* per-section vertical padding (measured) */
  --spacing: 8px;  /* measured base — drives the p-*/gap-* scale. steps seen on the page: 2, 4, 6, 8, 12, 16, 20, 24, 32, 48px */
}

Export: CSS variables

:root {
  /* action color #FF5900 — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FFFFFF;
  --surface: #F0F1F1;
  --border: #DBDCDD;
  --text: #15191E;
  --text-muted: #6D7073;
  --primary: #FF5900;  /* primary brand / action color. */
  --accent: #FF5900;  /* 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: #FF6B18;  /* 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: #FF3D00;  /* 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: #FF5900;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FCFCFD;
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --text-hero: 72px; --weight-hero: 500; --leading-hero: 72px; --tracking-hero: -1.44px;
  --text-h2: 48px; --weight-h2: 500; --leading-h2: 48px; --tracking-h2: -0.96px;
  --text-h3: 36px; --weight-h3: 500; --leading-h3: 36px; --tracking-h3: -0.72px;
  --text-body: 16px; --weight-body: 400; --leading-body: 24px; --tracking-body: -0.32px;
  --text-small: 14px; --weight-small: 500; --leading-small: 21px; --tracking-small: -0.28px;
  --radius: 10px;
  --radius-button: 10px;
  --radius-card: 12px;
  --radius-sharp: 3px;
  --shadow-card: rgba(0, 0, 0, 0.04) 0px 1px 1px 0px;
  --shadow-subtle: rgba(66, 87, 138, 0.15) 0px 1px 0px 0px;
  --btn-bg-hover: #FF6A17;
  --focus-ring: 1px solid rgb(255, 89, 1);
  --ease: ease-in-out;
  --duration-fast: 125ms;
  --duration-base: 200ms;
  --duration-slow: 500ms;
  --section-y: 48px;
}

/* their own tokens, verbatim from the site's :root */
:root {
  --font-inter: 'inter', 'inter Fallback';
  --font-flecha: 'flecha', 'flecha Fallback';
  --font-bronzea: 'bronzea', 'bronzea Fallback';
  --font-space-mono: 'Space Mono', 'Space Mono Fallback';
}
/* fonts: Inter — free, on Google. */