Braintrust — design system & UI screens

AI · 1 screen · 9 sections · https://www.braintrust.dev/

Light landing anchored by a distinctive purple barcode-style data-viz strip; eval-driven positioning over a dense trusted-by logo wall (Airtable, Notion, Stripe, Vercel, Ramp, Cloudflare).

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/website/braintrust.

Decoded design system

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

Full design system, per-section tokens & DESIGN.md / Tailwind / CSS exports →