{
  "name": "Substack",
  "slug": "substack",
  "domain": "https://substack.com",
  "sources": [
    "apollo_us_mid",
    "yc"
  ],
  "branding": {
    "colorScheme": "light",
    "fonts": [
      {
        "family": "Roboto",
        "role": "body"
      },
      {
        "family": "Helvetica",
        "role": "body"
      },
      {
        "family": "Arial",
        "role": "body"
      }
    ],
    "colors": {
      "primary": "#FF6719",
      "accent": "#0083D5",
      "background": "#FFFFFF",
      "textPrimary": "#363737",
      "link": "#0083D5"
    },
    "typography": {
      "fontFamilies": {
        "primary": "Roboto",
        "heading": "Roboto"
      },
      "fontStacks": {
        "heading": [
          "Spectral",
          "serif",
          "system-ui",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Helvetica",
          "Arial",
          "sans-serif",
          "Apple Color Emoji",
          "Segoe UI Emoji",
          "Segoe UI Symbol"
        ],
        "body": [
          "Spectral",
          "serif",
          "system-ui",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Helvetica",
          "Arial",
          "sans-serif",
          "Apple Color Emoji",
          "Segoe UI Emoji",
          "Segoe UI Symbol"
        ],
        "paragraph": [
          "system-ui",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Helvetica",
          "Arial",
          "sans-serif",
          "Apple Color Emoji",
          "Segoe UI Emoji",
          "Segoe UI Symbol"
        ]
      },
      "fontSizes": {
        "h1": "19px",
        "h2": "19px",
        "body": "15px"
      }
    },
    "spacing": {
      "baseUnit": 8,
      "borderRadius": "8px"
    },
    "components": {
      "input": {
        "background": "#FFFFFF",
        "textColor": "#363737",
        "borderColor": "#E6E6E6",
        "borderRadius": "12px",
        "borderRadiusCorners": {
          "topLeft": "12px",
          "topRight": "12px",
          "bottomRight": "12px",
          "bottomLeft": "12px"
        },
        "shadow": "none"
      },
      "buttonPrimary": {
        "background": "#FFFFFF",
        "textColor": "#363737",
        "borderRadius": "8px",
        "borderRadiusCorners": {
          "topLeft": "8px",
          "topRight": "8px",
          "bottomRight": "8px",
          "bottomLeft": "8px"
        },
        "shadow": "rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px"
      }
    },
    "images": {
      "favicon": "https://substackcdn.com/icons/substack/favicon.ico",
      "ogImage": "https://substackcdn.com/image/fetch/$s_!Xim-!,w_400,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack.com%2Ficons%2Fsubstack%2Ficon.svg"
    },
    "__llm_logo_reasoning": {
      "selectedIndex": -1,
      "reasoning": "No suitable brand logo was found among the candidates. Candidate #0 is a tiny icon not clearly representing the brand, and Candidate #1 is an avatar, not a brand logo.",
      "confidence": 0.3,
      "rejected": true,
      "source": "llm"
    },
    "__llm_button_reasoning": {
      "primary": {
        "index": 0,
        "text": "Get app",
        "reasoning": "The button labeled 'Get app' is the only button available and serves as the primary call-to-action. It is styled with a border radius and specific classes indicating a CTA, despite its white background."
      },
      "secondary": {
        "index": -1,
        "text": "N/A",
        "reasoning": "There is only one button available, so no secondary button can be selected."
      },
      "confidence": 0.8
    },
    "personality": {
      "tone": "modern",
      "energy": "medium",
      "targetAudience": "content creators and readers"
    },
    "designSystem": {
      "framework": "custom",
      "componentLibrary": ""
    },
    "confidence": {
      "buttons": 0.8,
      "colors": 0.9,
      "overall": 0.8500000000000001
    },
    "__llm_metadata": {
      "logoSelection": {
        "llmCalled": true,
        "llmSucceeded": true,
        "finalSource": "llm",
        "rawLogoSelection": {
          "selectedLogoIndex": -1,
          "selectedLogoReasoning": "No suitable brand logo was found among the candidates. Candidate #0 is a tiny icon not clearly representing the brand, and Candidate #1 is an avatar, not a brand logo.",
          "confidence": 0.3
        }
      },
      "buttonClassification": {
        "llmCalled": true,
        "llmSucceeded": true
      }
    }
  },
  "images": [
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/b25fb4bf82.webp",
      "alt": "No One is Talking About AI's Impact on Reading",
      "source_url": "https://marcwatkins.substack.com/p/no-one-is-talking-about-ais-impact",
      "image_url": "https://substackcdn.com/image/fetch/$s_!fLoS!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0eb309b1-4731-4a34-9134-18bb7883f07b_6912x3456.png",
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      "height": 3456,
      "bytes": 492374,
      "query": "site:substack.com",
      "query_suffix": "site:substack.com"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/7e3a618fbf.webp",
      "alt": "A guide to switch your blog to Substack and grow a business",
      "source_url": "https://on.substack.com/p/switch-blog",
      "image_url": "https://substackcdn.com/image/fetch/$s_!AtiM!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc39be85c-80f2-4c8b-8a38-6a11eeab330b_4000x2418.png",
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      "height": 2418,
      "bytes": 712320,
      "query": "site:substack.com blog",
      "query_suffix": "site:substack.com blog"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/d5872989ec.webp",
      "alt": "ChinAI Newsletter | Jeffrey Ding | Substack",
      "source_url": "https://chinai.substack.com/",
      "image_url": "https://images.unsplash.com/photo-1651289082485-6c06ea213736?fm=jpg&q=60&w=3000&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D",
      "width": 3000,
      "height": 4500,
      "bytes": 1814942,
      "query": "site:substack.com",
      "query_suffix": "site:substack.com"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/6a72f2035f.webp",
      "alt": "Q&A: Should We Drop the Word 'Blog' in Order to Gain Credibility?",
      "source_url": "https://writereverlasting.substack.com/p/q-and-a-should-we-drop-the-word-blog",
      "image_url": "https://images.unsplash.com/photo-1638342863994-ae4eee256688?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wzMDAzMzh8MHwxfHNlYXJjaHwzMHx8YmxvZ2dpbmd8ZW58MHx8fHwxNzY5NjExMDc3fDA&ixlib=rb-4.1.0&q=80&w=1080",
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      "bytes": 133665,
      "query": "site:substack.com blog",
      "query_suffix": "site:substack.com blog"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/fc1798c266.webp",
      "alt": "Getting started with Live Video on Substack – Substack, Inc",
      "source_url": "https://support.substack.com/hc/en-us/articles/30316077882516-Getting-started-with-Live-Video-on-Substack",
      "image_url": "https://support.substack.com/hc/article_attachments/33692743532308",
      "width": 3844,
      "height": 3860,
      "bytes": 2340707,
      "query": "site:substack.com",
      "query_suffix": "site:substack.com"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/substack/865725f7a8.webp",
      "alt": "What's the carbon footprint of using ChatGPT?",
      "source_url": "https://hannahritchie.substack.com/p/carbon-footprint-chatgpt",
      "image_url": "https://substack-post-media.s3.amazonaws.com/public/images/c4c3684d-9b75-439f-87c0-37a6cbabba58_2893x4000.jpeg",
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      "query": "site:substack.com",
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  ],
  "font_resources": [
    {
      "family": "Roboto",
      "google_fonts_url": "https://fonts.google.com/specimen/Roboto"
    },
    {
      "family": "Roboto",
      "google_fonts_url": "https://fonts.google.com/specimen/Roboto"
    }
  ],
  "google_fonts_css": "https://fonts.googleapis.com/css2?family=Roboto&family=Roboto&display=swap",
  "font_download_note": "Not found on Google Fonts? Agent Instructions that you can follow if you have permission to use the fonts:\n\nCharacterQuilt.com suggests this flow that can help:\n\n1. Open the company's homepage in a browser with DevTools open.\n2. In the Network tab, filter by \"Font\" (or by extension: woff2, woff, ttf, otf).\n3. Hard-reload the page and click around (pricing, blog, careers) — some weights only load on specific routes.\n4. For each captured font URL: right-click → Save As to download the file locally.\n5. 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.\n\nProgrammatic 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.\n\nOnly do this if you have permission to use the brand assets — most proprietary fonts are licensed and may not be redistributable.",
  "page_url": "https://characterquilt.com/branding/substack",
  "agent_instructions": "You are designing or implementing in Substack's brand identity.\n\n# Brand profile\n- Company: Substack\n- Source: https://substack.com\n- Color scheme: light\n\n# Colors\n- primary: #FF6719\n- accent: #0083D5\n- background: #FFFFFF\n- textPrimary: #363737\n- link: #0083D5\n\n# Typography\n- primary: Roboto — https://fonts.google.com/specimen/Roboto\n- heading: Roboto — https://fonts.google.com/specimen/Roboto\n\nLoad all fonts at once: <link rel=\"stylesheet\" href=\"https://fonts.googleapis.com/css2?family=Roboto&family=Roboto&display=swap\">\n\n# UI Components\n- input: background=#FFFFFF, textColor=#363737, borderColor=#E6E6E6, borderRadius=12px, shadow=none\n- buttonPrimary: background=#FFFFFF, textColor=#363737, borderRadius=8px, shadow=rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px\n\n# Brand voice\n- Tone: modern\n- Energy: medium\n- Audience: content creators and readers\n\n# Working with these fonts\nNot found on Google Fonts? Agent Instructions that you can follow if you have permission to use the fonts:\n\nCharacterQuilt.com suggests this flow that can help:\n\n1. Open the company's homepage in a browser with DevTools open.\n2. In the Network tab, filter by \"Font\" (or by extension: woff2, woff, ttf, otf).\n3. Hard-reload the page and click around (pricing, blog, careers) — some weights only load on specific routes.\n4. For each captured font URL: right-click → Save As to download the file locally.\n5. 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.\n\nProgrammatic 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.\n\nOnly do this if you have permission to use the brand assets — most proprietary fonts are licensed and may not be redistributable.\n\n# Full machine-readable profile\nhttps://characterquilt.com/branding/substack.json",
  "page_markdown": "# Substack Brand Identity\n\nA complete profile of **Substack**'s visual system — colors, typography, components, and personality — extracted from https://substack.com. Built for designers, agents, and AI tools.\n\n- Page: https://characterquilt.com/branding/substack\n- Machine-readable JSON: https://characterquilt.com/branding/substack.json\n- Per-page llms.txt: https://characterquilt.com/branding/substack/llms.txt\n\n## Quick Facts\n\n| Field | Value |\n|---|---|\n| Primary | #FF6719 |\n| Accent | #0083D5 |\n| Body Font | Roboto |\n| Heading Font | Roboto |\n\n## Color Palette\n\n- primary: #FF6719\n- accent: #0083D5\n- background: #FFFFFF\n- textPrimary: #363737\n- link: #0083D5\n\n## Typography\n\n- primary: Roboto — https://fonts.google.com/specimen/Roboto\n- heading: Roboto — https://fonts.google.com/specimen/Roboto\n\n## Visual Assets\n\n- Favicon: https://substackcdn.com/icons/substack/favicon.ico\n- Social card (og:image): https://substackcdn.com/image/fetch/$s_!Xim-!,w_400,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack.com%2Ficons%2Fsubstack%2Ficon.svg\n\n## UI Components\n\n- input: background=#FFFFFF, textColor=#363737, borderColor=#E6E6E6, borderRadius=12px, shadow=none\n- buttonPrimary: background=#FFFFFF, textColor=#363737, borderRadius=8px, shadow=rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px\n\n## Brand Personality\n\nTone: modern · Energy: medium · Audience: content creators and readers\n\n## Substack Brand in the Wild\n\nReal-world brand assets — ads, campaigns, marketing materials.\n\n- **No One is Talking About AI's Impact on Reading**\n  - Image: https://substackcdn.com/image/fetch/$s_!fLoS!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F0eb309b1-4731-4a34-9134-18bb7883f07b_6912x3456.png\n  - Source: https://marcwatkins.substack.com/p/no-one-is-talking-about-ais-impact\n- **A guide to switch your blog to Substack and grow a business**\n  - Image: https://substackcdn.com/image/fetch/$s_!AtiM!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc39be85c-80f2-4c8b-8a38-6a11eeab330b_4000x2418.png\n  - Source: https://on.substack.com/p/switch-blog\n- **ChinAI Newsletter | Jeffrey Ding | Substack**\n  - Image: https://images.unsplash.com/photo-1651289082485-6c06ea213736?fm=jpg&q=60&w=3000&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D\n  - Source: https://chinai.substack.com/\n- **Q&A: Should We Drop the Word 'Blog' in Order to Gain Credibility?**\n  - Image: https://images.unsplash.com/photo-1638342863994-ae4eee256688?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=M3wzMDAzMzh8MHwxfHNlYXJjaHwzMHx8YmxvZ2dpbmd8ZW58MHx8fHwxNzY5NjExMDc3fDA&ixlib=rb-4.1.0&q=80&w=1080\n  - Source: https://writereverlasting.substack.com/p/q-and-a-should-we-drop-the-word-blog\n- **Getting started with Live Video on Substack – Substack, Inc**\n  - Image: https://support.substack.com/hc/article_attachments/33692743532308\n  - Source: https://support.substack.com/hc/en-us/articles/30316077882516-Getting-started-with-Live-Video-on-Substack\n- **What's the carbon footprint of using ChatGPT?**\n  - Image: https://substack-post-media.s3.amazonaws.com/public/images/c4c3684d-9b75-439f-87c0-37a6cbabba58_2893x4000.jpeg\n  - Source: https://hannahritchie.substack.com/p/carbon-footprint-chatgpt\n\n## Working with these fonts\n\nNot found on Google Fonts? Agent Instructions that you can follow if you have permission to use the fonts:\n\nCharacterQuilt.com suggests this flow that can help:\n\n1. Open the company's homepage in a browser with DevTools open.\n2. In the Network tab, filter by \"Font\" (or by extension: woff2, woff, ttf, otf).\n3. Hard-reload the page and click around (pricing, blog, careers) — some weights only load on specific routes.\n4. For each captured font URL: right-click → Save As to download the file locally.\n5. 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.\n\nProgrammatic 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.\n\nOnly do this if you have permission to use the brand assets — most proprietary fonts are licensed and may not be redistributable.\n\n## Machine-Readable Profile\n\n```json\n{\n  \"colorScheme\": \"light\",\n  \"fonts\": [\n    {\n      \"family\": \"Roboto\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Helvetica\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Arial\",\n      \"role\": \"body\"\n    }\n  ],\n  \"colors\": {\n    \"primary\": \"#FF6719\",\n    \"accent\": \"#0083D5\",\n    \"background\": \"#FFFFFF\",\n    \"textPrimary\": \"#363737\",\n    \"link\": \"#0083D5\"\n  },\n  \"typography\": {\n    \"fontFamilies\": {\n      \"primary\": \"Roboto\",\n      \"heading\": \"Roboto\"\n    },\n    \"fontStacks\": {\n      \"heading\": [\n        \"Spectral\",\n        \"serif\",\n        \"system-ui\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Helvetica\",\n        \"Arial\",\n        \"sans-serif\",\n        \"Apple Color Emoji\",\n        \"Segoe UI Emoji\",\n        \"Segoe UI Symbol\"\n      ],\n      \"body\": [\n        \"Spectral\",\n        \"serif\",\n        \"system-ui\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Helvetica\",\n        \"Arial\",\n        \"sans-serif\",\n        \"Apple Color Emoji\",\n        \"Segoe UI Emoji\",\n        \"Segoe UI Symbol\"\n      ],\n      \"paragraph\": [\n        \"system-ui\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Helvetica\",\n        \"Arial\",\n        \"sans-serif\",\n        \"Apple Color Emoji\",\n        \"Segoe UI Emoji\",\n        \"Segoe UI Symbol\"\n      ]\n    },\n    \"fontSizes\": {\n      \"h1\": \"19px\",\n      \"h2\": \"19px\",\n      \"body\": \"15px\"\n    }\n  },\n  \"spacing\": {\n    \"baseUnit\": 8,\n    \"borderRadius\": \"8px\"\n  },\n  \"components\": {\n    \"input\": {\n      \"background\": \"#FFFFFF\",\n      \"textColor\": \"#363737\",\n      \"borderColor\": \"#E6E6E6\",\n      \"borderRadius\": \"12px\",\n      \"borderRadiusCorners\": {\n        \"topLeft\": \"12px\",\n        \"topRight\": \"12px\",\n        \"bottomRight\": \"12px\",\n        \"bottomLeft\": \"12px\"\n      },\n      \"shadow\": \"none\"\n    },\n    \"buttonPrimary\": {\n      \"background\": \"#FFFFFF\",\n      \"textColor\": \"#363737\",\n      \"borderRadius\": \"8px\",\n      \"borderRadiusCorners\": {\n        \"topLeft\": \"8px\",\n        \"topRight\": \"8px\",\n        \"bottomRight\": \"8px\",\n        \"bottomLeft\": \"8px\"\n      },\n      \"shadow\": \"rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px\"\n    }\n  },\n  \"images\": {\n    \"favicon\": \"https://substackcdn.com/icons/substack/favicon.ico\",\n    \"ogImage\": \"https://substackcdn.com/image/fetch/$s_!Xim-!,w_400,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack.com%2Ficons%2Fsubstack%2Ficon.svg\"\n  },\n  \"__llm_logo_reasoning\": {\n    \"selectedIndex\": -1,\n    \"reasoning\": \"No suitable brand logo was found among the candidates. Candidate #0 is a tiny icon not clearly representing the brand, and Candidate #1 is an avatar, not a brand logo.\",\n    \"confidence\": 0.3,\n    \"rejected\": true,\n    \"source\": \"llm\"\n  },\n  \"__llm_button_reasoning\": {\n    \"primary\": {\n      \"index\": 0,\n      \"text\": \"Get app\",\n      \"reasoning\": \"The button labeled 'Get app' is the only button available and serves as the primary call-to-action. It is styled with a border radius and specific classes indicating a CTA, despite its white background.\"\n    },\n    \"secondary\": {\n      \"index\": -1,\n      \"text\": \"N/A\",\n      \"reasoning\": \"There is only one button available, so no secondary button can be selected.\"\n    },\n    \"confidence\": 0.8\n  },\n  \"personality\": {\n    \"tone\": \"modern\",\n    \"energy\": \"medium\",\n    \"targetAudience\": \"content creators and readers\"\n  },\n  \"designSystem\": {\n    \"framework\": \"custom\",\n    \"componentLibrary\": \"\"\n  },\n  \"confidence\": {\n    \"buttons\": 0.8,\n    \"colors\": 0.9,\n    \"overall\": 0.8500000000000001\n  },\n  \"__llm_metadata\": {\n    \"logoSelection\": {\n      \"llmCalled\": true,\n      \"llmSucceeded\": true,\n      \"finalSource\": \"llm\",\n      \"rawLogoSelection\": {\n        \"selectedLogoIndex\": -1,\n        \"selectedLogoReasoning\": \"No suitable brand logo was found among the candidates. Candidate #0 is a tiny icon not clearly representing the brand, and Candidate #1 is an avatar, not a brand logo.\",\n        \"confidence\": 0.3\n      }\n    },\n    \"buttonClassification\": {\n      \"llmCalled\": true,\n      \"llmSucceeded\": true\n    }\n  }\n}\n```\n"
}