# LangChain Brand Identity A complete profile of **LangChain**'s visual system — colors, typography, components, and personality — extracted from https://www.langchain.com/?ref=startups.gallery. Built for designers, agents, and AI tools. - Page: https://characterquilt.com/branding/langchain - Machine-readable JSON: https://characterquilt.com/branding/langchain.json - Per-page llms.txt: https://characterquilt.com/branding/langchain/llms.txt ## Quick Facts | Field | Value | |---|---| | Primary | #CCE9FF | | Accent | #7FC8FF | | Body Font | Twklausanne | | Heading Font | Aeonik | ## Color Palette - primary: #CCE9FF - secondary: #E5F4FF - accent: #7FC8FF - background: #030710 - textPrimary: #030710 - link: #7FC8FF ## Typography - primary: Twklausanne — https://fonts.google.com/specimen/Twklausanne - heading: Aeonik — https://fonts.google.com/specimen/Aeonik ## Visual Assets - Logo: 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- Favicon: https://cdn.prod.website-files.com/65b8cd72835ceeacd4449a53/69a17e4a429d54e956e2a763_favicon.png - Social card (og:image): https://cdn.prod.website-files.com/65b8cd72835ceeacd4449a53/69a1e9409d6b1c287c69da0d_Website%20preview.png ## UI Components - input: background=#030710, textColor=#CCE9FF, borderColor=#262C36, borderRadius=6.75px, shadow=none - buttonPrimary: background=#E5F4FF, textColor=#030710, borderRadius=6.75px, shadow=none - buttonSecondary: background=#030710, textColor=#CCE9FF, borderColor=#2F4B68, borderRadius=6.75px, shadow=none ## Brand Personality Tone: modern · Energy: medium · Audience: tech professionals and AI developers ## LangChain Brand in the Wild Real-world brand assets — ads, campaigns, marketing materials. - **Use time-travel - Docs by LangChain** - Image: https://mintcdn.com/langchain-5e9cc07a/-_xGPoyjhyiDWTPJ/oss/images/checkpoints_full_story.jpg?fit=max&auto=format&n=-_xGPoyjhyiDWTPJ&q=85&s=a52016b2c44b57bd395d6e1eac47aa36 - Source: https://docs.langchain.com/oss/javascript/langgraph/use-time-travel - **Deconstructing RAG** - Image: https://cdn.prod.website-files.com/65c81e88c254bb0f97633a71/69cbb0a5504e43f62959ea53_blog_figure.jpeg - Source: https://www.langchain.com/blog/deconstructing-rag - **LangChain Events: AI Conferences, Meetups & Webinars** - Image: https://cdn.prod.website-files.com/65c81e88c254bb0f97633a71/69e908a3b281029c331b60fb_1d7f96a9-a23b-4316-9fa3-749a7d3227bc.png - Source: https://www.langchain.com/events - **Open Source Extraction Service** - Image: https://cdn.prod.website-files.com/65c81e88c254bb0f97633a71/69cbaffcf3571add5bca9ff6_Extraction_blog-1.png - Source: https://www.langchain.com/blog/open-source-extraction-service - **Agent Observability: How to Monitor and Evaluate LLM Agents in Production** - Image: https://cdn.prod.website-files.com/65c81e88c254bb0f97633a71/69e9d0c071ff058cd3f01213_699f6ae5c8fe8bec5769419d_Production%2520Monitoring%2520cycle.png - Source: https://www.langchain.com/blog/production-monitoring - **LangChain Blog** - Image: https://cdn.prod.website-files.com/65c81e88c254bb0f97633a71/69e251cee3c69c0b64e26c79_case-study-16_9%20(1).png - Source: https://www.langchain.com/blog ## Working with these fonts Not found on Google Fonts? Agent Instructions that you can follow if you have permission to use the fonts: CharacterQuilt.com suggests this flow that can help: 1. Open the company's homepage in a browser with DevTools open. 2. In the Network tab, filter by "Font" (or by extension: woff2, woff, ttf, otf). 3. Hard-reload the page and click around (pricing, blog, careers) — some weights only load on specific routes. 4. For each captured font URL: right-click → Save As to download the file locally. 5. View the page's CSS (DevTools → Sources, or curl the stylesheet URLs) and copy out the matching @font-face declarations. Rewrite each `src: url(...)` to point to your local file path. Programmatic alternative: load the URL with Playwright or Puppeteer, listen for `response` events whose `Content-Type` starts with `font/`, and write the body to disk. The CSS extraction step is the same. Only do this if you have permission to use the brand assets — most proprietary fonts are licensed and may not be redistributable. ## Machine-Readable Profile ```json { "colorScheme": "dark", "fonts": [ { "family": "Aeonik", "role": "heading" }, { "family": "Twklausanne", "role": "body" } ], "colors": { "primary": "#CCE9FF", "secondary": "#E5F4FF", "accent": "#7FC8FF", "background": "#030710", "textPrimary": "#030710", "link": "#7FC8FF" }, "typography": { "fontFamilies": { "primary": "Twklausanne", "heading": "Aeonik" }, "fontStacks": { "heading": [ "Twklausanne", "Tahoma", "sans-serif" ], "body": [ "Aeonik", "Tahoma", "sans-serif" ], "paragraph": [ "Aeonik", "Tahoma", "sans-serif" ] }, "fontSizes": { "h1": "68.4px", "h2": "54px", "body": "20.25px" } }, "spacing": { "baseUnit": 4, "borderRadius": "18px" }, "components": { "input": { "background": "#030710", "textColor": "#CCE9FF", "borderColor": "#262C36", "borderRadius": "6.75px", "borderRadiusCorners": { "topLeft": "6.75px", "topRight": "6.75px", "bottomRight": "6.75px", "bottomLeft": "6.75px" }, "shadow": "none" }, "buttonPrimary": { "background": "#E5F4FF", "textColor": "#030710", "borderRadius": "6.75px", "borderRadiusCorners": { "topLeft": "6.75px", "topRight": "6.75px", "bottomRight": "6.75px", "bottomLeft": "6.75px" }, "shadow": "none" }, "buttonSecondary": { "background": "#030710", "textColor": "#CCE9FF", "borderColor": "#2F4B68", "borderRadius": "6.75px", "borderRadiusCorners": { "topLeft": "6.75px", "topRight": "6.75px", "bottomRight": "6.75px", "bottomLeft": "6.75px" }, "shadow": "none" } }, "images": { "logo": 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"favicon": "https://cdn.prod.website-files.com/65b8cd72835ceeacd4449a53/69a17e4a429d54e956e2a763_favicon.png", "ogImage": "https://cdn.prod.website-files.com/65b8cd72835ceeacd4449a53/69a1e9409d6b1c287c69da0d_Website%20preview.png", "logoHref": "/" }, "__llm_logo_reasoning": { "selectedIndex": 5, "reasoning": "Selected #0 because it is located in the header, links to the homepage, and matches the brand name 'LangChain'.", "confidence": 0.9, "source": "llm" }, "__llm_button_reasoning": { "primary": { "index": 0, "text": "Start building", "reasoning": "Button #0 'Start building' is likely the primary CTA due to its action-oriented text and vibrant blue background, which aligns with the brand's accent color." }, "secondary": { "index": 2, "text": "Get a demo", "reasoning": "Button #2 'Get a demo' is chosen as secondary due to its contrasting dark background, making it distinct from the primary button's color group." }, "confidence": 0.9 }, "personality": { "tone": "modern", "energy": "medium", "targetAudience": "tech professionals and AI developers" }, "designSystem": { "framework": "custom", "componentLibrary": "" }, "confidence": { "buttons": 0.9, "colors": 0.95, "overall": 0.925 }, "__llm_metadata": { "logoSelection": { "llmCalled": true, "llmSucceeded": true, "finalSource": "llm", "rawLogoSelection": { "selectedLogoIndex": 0, "selectedLogoReasoning": "Selected #0 because it is located in the header, links to the homepage, and matches the brand name 'LangChain'.", "confidence": 0.9 } }, "buttonClassification": { "llmCalled": true, "llmSucceeded": true } } } ```