Braintrust — Design System

Name: Braintrust design system
Creator: Mozaika
Keywords: design system, design tokens, Braintrust, light, tailwind

light · modern · high · tailwind · confidence 92%

The full decoded design system for Braintrust: color roles, type scale, spacing, radii and paste-ready DESIGN.md / Tailwind / CSS exports.

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/braintrust.

Tokens

Braintrust's decoded design system: background #FFFFFF, text #000000, accent #2C1FEA, link #F5AFD1, primary #2C1FEA; type scale h1 60px / h2 20px / body 14px; 8px spacing base; 4px base radius. The single interactive/action color is #2C1FEA — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#FFFFFF`
surface	`#EFEFEF`
border	`#D8D8D8`
text	`#000000`
text_muted	`#606060`
primary	`#2C1FEA`
accent	`#2C1FEA`
link	`#F5AFD1`
secondary	`#1E2939`
button_bg	`#2C1FEA`
button_text	`#FFFFFF`

Using these colors

Action color #2C1FEA — the single interactive color; only on things you click or must notice, never large fills.
primary, accent, button_bg are all #2C1FEA — one role, not several (the action color).
accent #2C1FEA — 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 #F5AFD1 — fails contrast on the background (~1.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
secondary #1E2939 — 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: Inter
Body: btSans
Mono: suisseMono
h1: 60px
h2: 20px
body: 14px

Spacing

base unit: 8px
scale: 4px, 8px, 12px, 16px, 24px, 32px, 48px, 64px

Radii

base: 4px
button: 24px

Per-section tokens (9)

Export: DESIGN.md

# Braintrust — Design System

> light, modern, high, tailwind

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#EFEFEF` |
| border | `#D8D8D8` |
| text | `#000000` |
| text_muted | `#606060` |
| primary | `#2C1FEA` |
| accent | `#2C1FEA` |
| link | `#F5AFD1` |
| secondary | `#1E2939` |
| button_bg | `#2C1FEA` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#2C1FEA` — 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 `#2C1FEA` — one role, not several (your action color).
- **accent** `#2C1FEA` — 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** `#F5AFD1` — fails contrast on the background (~1.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference).
- **secondary** `#1E2939` — 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: **Inter**
- Body: **btSans** _(free fallback: Newsreader)_
- Mono: **suisseMono**

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 60px / 400 · lh 60px |
| h2 | 48px / 400 · lh 48px |
| h3 | 24px / 600 · lh 32px |
| body | 14px / 400 · lh 20px |
| small | 12px / 400 · lh 16px |
| eyebrow | 12px / 400 · tracking 0.6px |

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

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

## Spacing
- base unit: 8px
- scale: 4px, 8px, 12px, 16px, 24px, 32px, 48px, 64px

## Radius
- base: 4px
- button: 24px
- card: 6px
- pill: 9999px

## Primary button
- bg `#2C1FEA` · text `#FFFFFF` · radius 24px

## 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 #2C1FEA — the one interactive color; buttons/links/emphasis only, never large fills. */
  --color-bg: #FFFFFF;
  --color-surface: #EFEFEF;
  --color-border: #D8D8D8;
  --color-text: #000000;
  --color-text-muted: #606060;
  --color-primary: #2C1FEA;  /* primary brand / action color. */
  --color-accent: #2C1FEA;  /* 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: #F5AFD1;  /* fails contrast on the background (~1.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --color-secondary: #1E2939;  /* 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: #2C1FEA;  /* primary-button fill — the main call-to-action color. */
  --color-button-text: #FFFFFF;
  /* fonts: Inter — free, on Google. btSans may be proprietary — safe free fallback: Newsreader (Google Fonts). */
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "btSans", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "suisseMono", ui-monospace, monospace;
  /* measured weights: 400, 500, 600 — use these, not 400/600 */
  --text-hero: 60px; --font-weight-hero: 400; --leading-hero: 60px;
  --text-h2: 48px; --font-weight-h2: 400; --leading-h2: 48px;
  --text-h3: 24px; --font-weight-h3: 600; --leading-h3: 32px;
  --text-body: 14px; --font-weight-body: 400; --leading-body: 20px;
  --text-small: 12px; --font-weight-small: 400; --leading-small: 16px;
  --text-eyebrow: 12px; --font-weight-eyebrow: 400; --tracking-eyebrow: 0.6px;
  --radius-base: 4px;
  --radius-button: 24px;
  --radius-card: 6px;
  --radius-pill: 9999px;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 24px;
  --spacing-6: 32px;
  --spacing-7: 48px;
  --spacing-8: 64px;
}

Export: CSS variables

:root {
  /* action color #2C1FEA — the one interactive color; buttons/links/emphasis only, never large fills. */
  --bg: #FFFFFF;
  --surface: #EFEFEF;
  --border: #D8D8D8;
  --text: #000000;
  --text-muted: #606060;
  --primary: #2C1FEA;  /* primary brand / action color. */
  --accent: #2C1FEA;  /* 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: #F5AFD1;  /* fails contrast on the background (~1.8:1) — this is a dark UI color, NOT a readable link; use the text or action color for links (verify against the reference). */
  --secondary: #1E2939;  /* 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: #2C1FEA;  /* primary-button fill — the main call-to-action color. */
  --button-text: #FFFFFF;
  --font-heading: "Inter", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: "btSans", "Newsreader", system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: "suisseMono", ui-monospace, monospace;
  --text-hero: 60px; --weight-hero: 400; --leading-hero: 60px;
  --text-h2: 48px; --weight-h2: 400; --leading-h2: 48px;
  --text-h3: 24px; --weight-h3: 600; --leading-h3: 32px;
  --text-body: 14px; --weight-body: 400; --leading-body: 20px;
  --text-small: 12px; --weight-small: 400; --leading-small: 16px;
  --text-eyebrow: 12px; --weight-eyebrow: 400; --tracking-eyebrow: 0.6px;
  --radius: 4px;
  --radius-button: 24px;
  --radius-card: 6px;
  --radius-pill: 9999px;
}
/* fonts: Inter — free, on Google. btSans may be proprietary — safe free fallback: Newsreader (Google Fonts). */