LangChain — design system & UI screens

AI · 1 screen · 13 sections · https://www.langchain.com/

Dark hero with a luminous branching tree diagram tracing Build to Test to Deploy to Monitor; LangSmith positioning in minimal centered type over black.

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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/langchain.

Decoded design system

LangChain's decoded design system: background #030710, text #E5F4FF, accent #7FC8FF, link #7FC8FF, primary #CCE9FF; type scale h1 63px / h2 54px / body 20.25px; 4px spacing base; 18px base radius. The single interactive/action color is #E5F4FF — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Role	Value
bg	`#030710`
surface	`#10151E`
border	`#242A33`
text	`#E5F4FF`
text_muted	`#8F99A4`
primary	`#CCE9FF`
accent	`#7FC8FF`
link	`#7FC8FF`
secondary	`#E5F4FF`
button_bg	`#E5F4FF`
button_text	`#030710`

Using these colors

Action color #E5F4FF — the single interactive color; only on things you click or must notice, never large fills.
accent, link are all #7FC8FF — one role, not several (the action color).
secondary, button_bg are all #E5F4FF — one role, not several (the action color).
accent #7FC8FF — accent for emphasis — keep it rare on the page.
primary #CCE9FF — a neutral UI color (chips, tags, icon fills, chrome), not the action color (action = #E5F4FF).

Typography

Heading: Twklausanne
Body: Aeonik
h1: 63px
h2: 54px
body: 20.25px

Spacing

base unit: 4px
scale: 2px, 4px, 6px, 8px, 12px, 16px, 24px, 32px

Radii

base: 18px
button: 7px

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