{
  "name": "Ultralight",
  "slug": "ultralight",
  "domain": "https://ultralig.ht",
  "sources": [
    "yc"
  ],
  "branding": {
    "colorScheme": "dark",
    "fonts": [
      {
        "family": "Roboto",
        "role": "body"
      },
      {
        "family": "Segoe UI",
        "role": "body"
      },
      {
        "family": "Open Sans",
        "role": "body"
      },
      {
        "family": "Ubuntu",
        "role": "body"
      },
      {
        "family": "Helvetica Neue",
        "role": "body"
      }
    ],
    "colors": {
      "primary": "#D6D4FF",
      "secondary": "#EAE9FF",
      "accent": "#0A0B1C",
      "background": "#090714",
      "textPrimary": "#0A0B1C",
      "link": "#0A0B1C"
    },
    "typography": {
      "fontFamilies": {
        "primary": "Roboto",
        "heading": "Roboto"
      },
      "fontStacks": {
        "heading": [
          "AvenirNextLTPro-Bold",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Oxygen",
          "Ubuntu",
          "Cantarell",
          "Open Sans",
          "Helvetica Neue",
          "sans-serif"
        ],
        "body": [
          "Rubik",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Oxygen",
          "Ubuntu",
          "Cantarell",
          "Open Sans",
          "Helvetica Neue",
          "sans-serif"
        ],
        "paragraph": [
          "Rubik",
          "-apple-system",
          "BlinkMacSystemFont",
          "Segoe UI",
          "Roboto",
          "Oxygen",
          "Ubuntu",
          "Cantarell",
          "Open Sans",
          "Helvetica Neue",
          "sans-serif"
        ]
      },
      "fontSizes": {
        "h1": "75px",
        "h2": "35.25px",
        "body": "21px"
      }
    },
    "spacing": {
      "baseUnit": 4,
      "borderRadius": "3px"
    },
    "components": {
      "buttonPrimary": {
        "background": "#0A0B1C",
        "textColor": "#CDC6FF",
        "borderColor": "#5F5779",
        "borderRadius": "18px",
        "borderRadiusCorners": {
          "topLeft": "18px",
          "topRight": "18px",
          "bottomRight": "18px",
          "bottomLeft": "18px"
        },
        "shadow": "rgba(15, 7, 49, 0.32) 0px 10px 40px 0px, rgba(97, 27, 255, 0.25) 0px 0px 15px 0px inset"
      },
      "buttonSecondary": {
        "background": "#0F0F23",
        "textColor": "#D0C0FF",
        "borderColor": "#8F77D0",
        "borderRadius": "16.8px",
        "borderRadiusCorners": {
          "topLeft": "16.8px",
          "topRight": "16.8px",
          "bottomRight": "16.8px",
          "bottomLeft": "16.8px"
        },
        "shadow": "rgb(58, 41, 133) 0px 0px 4px 0px, rgb(58, 41, 133) 0px 0px 4px 0px inset"
      }
    },
    "images": {
      "logo": "https://ultralig.ht/media/ul_logo_wordmark_sm.png",
      "favicon": "https://ultralig.ht/favicon-48x48.png",
      "ogImage": null,
      "logoHref": "/"
    },
    "__llm_logo_reasoning": {
      "selectedIndex": 3,
      "reasoning": "Selected #3 because it is a medium-sized logo with a wordmark shape, visible, and links to the homepage, making it the primary brand logo for Ultralight.",
      "confidence": 0.85,
      "source": "llm"
    },
    "__llm_button_reasoning": {
      "primary": {
        "index": 2,
        "text": "Download SDK",
        "reasoning": "Button #2 is labeled 'Download SDK' and has the class 'button-primary', indicating it is the main call-to-action. Its background color is distinct from others, making it stand out as the primary CTA."
      },
      "secondary": {
        "index": 1,
        "text": "Native App Guide",
        "reasoning": "Button #1, 'Native App Guide', has a different background color from the primary button and serves as a secondary action, guiding users to additional resources."
      },
      "confidence": 0.9
    },
    "personality": {
      "tone": "modern",
      "energy": "medium",
      "targetAudience": "developers"
    },
    "designSystem": {
      "framework": "custom",
      "componentLibrary": ""
    },
    "confidence": {
      "buttons": 0.9,
      "colors": 0.9,
      "overall": 0.9
    },
    "__llm_metadata": {
      "logoSelection": {
        "llmCalled": true,
        "llmSucceeded": true,
        "finalSource": "llm",
        "rawLogoSelection": {
          "selectedLogoIndex": 3,
          "selectedLogoReasoning": "Selected #3 because it is a medium-sized logo with a wordmark shape, visible, and links to the homepage, making it the primary brand logo for Ultralight.",
          "confidence": 0.85
        }
      },
      "buttonClassification": {
        "llmCalled": true,
        "llmSucceeded": true
      }
    }
  },
  "images": [
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/adcb270fe9.webp",
      "alt": "Architecture",
      "source_url": "https://docs.ultralig.ht/docs/architecture",
      "image_url": "https://files.readme.io/a9ddd98-library_design.png",
      "width": 1800,
      "height": 1200,
      "bytes": 91044,
      "query": "site:ultralig.ht",
      "query_suffix": "site:ultralig.ht"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/11f46c9e01.webp",
      "alt": "Ultralight 1.4 Out Now",
      "source_url": "https://ultralig.ht/blog/ultralight-1-4-out-now",
      "image_url": "https://ultralig.ht/media/blog/image-source-graphic.png",
      "width": 1946,
      "height": 1100,
      "bytes": 3235862,
      "query": "site:ultralig.ht",
      "query_suffix": "site:ultralig.ht"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/9184c65f74.webp",
      "alt": "Ultralight - Universal, Pure-GPU HTML Renderer",
      "source_url": "https://ultralig.ht/",
      "image_url": "https://ultralig.ht/media/ul_logo.webp",
      "width": 1300,
      "height": 1300,
      "bytes": 173792,
      "query": "site:ultralig.ht",
      "query_suffix": "site:ultralig.ht"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/a0155c6645.webp",
      "alt": "Ultralight 1.4 Out Now",
      "source_url": "https://ultralig.ht/blog/ultralight-1-4-out-now",
      "image_url": "https://ultralig.ht/media/ul-1-4-graphic.png",
      "width": 1434,
      "height": 674,
      "bytes": 1349590,
      "query": "site:ultralig.ht blog",
      "query_suffix": "site:ultralig.ht blog"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/de1f9d6911.webp",
      "alt": "Ultralight - Universal, Pure-GPU HTML Renderer",
      "source_url": "https://ultralig.ht/",
      "image_url": "https://ultralig.ht/media/logo-ubisoft.png",
      "width": 1695,
      "height": 850,
      "bytes": 55233,
      "query": "site:ultralig.ht",
      "query_suffix": "site:ultralig.ht"
    },
    {
      "file": "https://e4p9rs3sldnmtboz.public.blob.vercel-storage.com/ultralight/3fafb0ac95.webp",
      "alt": "Ultralight - Universal, Pure-GPU HTML Renderer",
      "source_url": "https://ultralig.ht/",
      "image_url": "https://ultralig.ht/media/base-memory-usage.webp",
      "width": 1400,
      "height": 1000,
      "bytes": 33424,
      "query": "site:ultralig.ht",
      "query_suffix": "site:ultralig.ht"
    }
  ],
  "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/ultralight",
  "agent_instructions": "You are designing or implementing in Ultralight's brand identity.\n\n# Brand profile\n- Company: Ultralight\n- Source: https://ultralig.ht\n- Color scheme: dark\n\n# Colors\n- primary: #D6D4FF\n- secondary: #EAE9FF\n- accent: #0A0B1C\n- background: #090714\n- textPrimary: #0A0B1C\n- link: #0A0B1C\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- buttonPrimary: background=#0A0B1C, textColor=#CDC6FF, borderColor=#5F5779, borderRadius=18px, shadow=rgba(15, 7, 49, 0.32) 0px 10px 40px 0px, rgba(97, 27, 255, 0.25) 0px 0px 15px 0px inset\n- buttonSecondary: background=#0F0F23, textColor=#D0C0FF, borderColor=#8F77D0, borderRadius=16.8px, shadow=rgb(58, 41, 133) 0px 0px 4px 0px, rgb(58, 41, 133) 0px 0px 4px 0px inset\n\n# Brand voice\n- Tone: modern\n- Energy: medium\n- Audience: developers\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/ultralight.json",
  "page_markdown": "# Ultralight Brand Identity\n\nA complete profile of **Ultralight**'s visual system — colors, typography, components, and personality — extracted from https://ultralig.ht. Built for designers, agents, and AI tools.\n\n- Page: https://characterquilt.com/branding/ultralight\n- Machine-readable JSON: https://characterquilt.com/branding/ultralight.json\n- Per-page llms.txt: https://characterquilt.com/branding/ultralight/llms.txt\n\n## Quick Facts\n\n| Field | Value |\n|---|---|\n| Primary | #D6D4FF |\n| Accent | #0A0B1C |\n| Body Font | Roboto |\n| Heading Font | Roboto |\n\n## Color Palette\n\n- primary: #D6D4FF\n- secondary: #EAE9FF\n- accent: #0A0B1C\n- background: #090714\n- textPrimary: #0A0B1C\n- link: #0A0B1C\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- Logo: https://ultralig.ht/media/ul_logo_wordmark_sm.png\n- Favicon: https://ultralig.ht/favicon-48x48.png\n\n## UI Components\n\n- buttonPrimary: background=#0A0B1C, textColor=#CDC6FF, borderColor=#5F5779, borderRadius=18px, shadow=rgba(15, 7, 49, 0.32) 0px 10px 40px 0px, rgba(97, 27, 255, 0.25) 0px 0px 15px 0px inset\n- buttonSecondary: background=#0F0F23, textColor=#D0C0FF, borderColor=#8F77D0, borderRadius=16.8px, shadow=rgb(58, 41, 133) 0px 0px 4px 0px, rgb(58, 41, 133) 0px 0px 4px 0px inset\n\n## Brand Personality\n\nTone: modern · Energy: medium · Audience: developers\n\n## Ultralight Brand in the Wild\n\nReal-world brand assets — ads, campaigns, marketing materials.\n\n- **Architecture**\n  - Image: https://files.readme.io/a9ddd98-library_design.png\n  - Source: https://docs.ultralig.ht/docs/architecture\n- **Ultralight 1.4 Out Now**\n  - Image: https://ultralig.ht/media/blog/image-source-graphic.png\n  - Source: https://ultralig.ht/blog/ultralight-1-4-out-now\n- **Ultralight - Universal, Pure-GPU HTML Renderer**\n  - Image: https://ultralig.ht/media/ul_logo.webp\n  - Source: https://ultralig.ht/\n- **Ultralight 1.4 Out Now**\n  - Image: https://ultralig.ht/media/ul-1-4-graphic.png\n  - Source: https://ultralig.ht/blog/ultralight-1-4-out-now\n- **Ultralight - Universal, Pure-GPU HTML Renderer**\n  - Image: https://ultralig.ht/media/logo-ubisoft.png\n  - Source: https://ultralig.ht/\n- **Ultralight - Universal, Pure-GPU HTML Renderer**\n  - Image: https://ultralig.ht/media/base-memory-usage.webp\n  - Source: https://ultralig.ht/\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\": \"dark\",\n  \"fonts\": [\n    {\n      \"family\": \"Roboto\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Segoe UI\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Open Sans\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Ubuntu\",\n      \"role\": \"body\"\n    },\n    {\n      \"family\": \"Helvetica Neue\",\n      \"role\": \"body\"\n    }\n  ],\n  \"colors\": {\n    \"primary\": \"#D6D4FF\",\n    \"secondary\": \"#EAE9FF\",\n    \"accent\": \"#0A0B1C\",\n    \"background\": \"#090714\",\n    \"textPrimary\": \"#0A0B1C\",\n    \"link\": \"#0A0B1C\"\n  },\n  \"typography\": {\n    \"fontFamilies\": {\n      \"primary\": \"Roboto\",\n      \"heading\": \"Roboto\"\n    },\n    \"fontStacks\": {\n      \"heading\": [\n        \"AvenirNextLTPro-Bold\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Oxygen\",\n        \"Ubuntu\",\n        \"Cantarell\",\n        \"Open Sans\",\n        \"Helvetica Neue\",\n        \"sans-serif\"\n      ],\n      \"body\": [\n        \"Rubik\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Oxygen\",\n        \"Ubuntu\",\n        \"Cantarell\",\n        \"Open Sans\",\n        \"Helvetica Neue\",\n        \"sans-serif\"\n      ],\n      \"paragraph\": [\n        \"Rubik\",\n        \"-apple-system\",\n        \"BlinkMacSystemFont\",\n        \"Segoe UI\",\n        \"Roboto\",\n        \"Oxygen\",\n        \"Ubuntu\",\n        \"Cantarell\",\n        \"Open Sans\",\n        \"Helvetica Neue\",\n        \"sans-serif\"\n      ]\n    },\n    \"fontSizes\": {\n      \"h1\": \"75px\",\n      \"h2\": \"35.25px\",\n      \"body\": \"21px\"\n    }\n  },\n  \"spacing\": {\n    \"baseUnit\": 4,\n    \"borderRadius\": \"3px\"\n  },\n  \"components\": {\n    \"buttonPrimary\": {\n      \"background\": \"#0A0B1C\",\n      \"textColor\": \"#CDC6FF\",\n      \"borderColor\": \"#5F5779\",\n      \"borderRadius\": \"18px\",\n      \"borderRadiusCorners\": {\n        \"topLeft\": \"18px\",\n        \"topRight\": \"18px\",\n        \"bottomRight\": \"18px\",\n        \"bottomLeft\": \"18px\"\n      },\n      \"shadow\": \"rgba(15, 7, 49, 0.32) 0px 10px 40px 0px, rgba(97, 27, 255, 0.25) 0px 0px 15px 0px inset\"\n    },\n    \"buttonSecondary\": {\n      \"background\": \"#0F0F23\",\n      \"textColor\": \"#D0C0FF\",\n      \"borderColor\": \"#8F77D0\",\n      \"borderRadius\": \"16.8px\",\n      \"borderRadiusCorners\": {\n        \"topLeft\": \"16.8px\",\n        \"topRight\": \"16.8px\",\n        \"bottomRight\": \"16.8px\",\n        \"bottomLeft\": \"16.8px\"\n      },\n      \"shadow\": \"rgb(58, 41, 133) 0px 0px 4px 0px, rgb(58, 41, 133) 0px 0px 4px 0px inset\"\n    }\n  },\n  \"images\": {\n    \"logo\": \"https://ultralig.ht/media/ul_logo_wordmark_sm.png\",\n    \"favicon\": \"https://ultralig.ht/favicon-48x48.png\",\n    \"ogImage\": null,\n    \"logoHref\": \"/\"\n  },\n  \"__llm_logo_reasoning\": {\n    \"selectedIndex\": 3,\n    \"reasoning\": \"Selected #3 because it is a medium-sized logo with a wordmark shape, visible, and links to the homepage, making it the primary brand logo for Ultralight.\",\n    \"confidence\": 0.85,\n    \"source\": \"llm\"\n  },\n  \"__llm_button_reasoning\": {\n    \"primary\": {\n      \"index\": 2,\n      \"text\": \"Download SDK\",\n      \"reasoning\": \"Button #2 is labeled 'Download SDK' and has the class 'button-primary', indicating it is the main call-to-action. Its background color is distinct from others, making it stand out as the primary CTA.\"\n    },\n    \"secondary\": {\n      \"index\": 1,\n      \"text\": \"Native App Guide\",\n      \"reasoning\": \"Button #1, 'Native App Guide', has a different background color from the primary button and serves as a secondary action, guiding users to additional resources.\"\n    },\n    \"confidence\": 0.9\n  },\n  \"personality\": {\n    \"tone\": \"modern\",\n    \"energy\": \"medium\",\n    \"targetAudience\": \"developers\"\n  },\n  \"designSystem\": {\n    \"framework\": \"custom\",\n    \"componentLibrary\": \"\"\n  },\n  \"confidence\": {\n    \"buttons\": 0.9,\n    \"colors\": 0.9,\n    \"overall\": 0.9\n  },\n  \"__llm_metadata\": {\n    \"logoSelection\": {\n      \"llmCalled\": true,\n      \"llmSucceeded\": true,\n      \"finalSource\": \"llm\",\n      \"rawLogoSelection\": {\n        \"selectedLogoIndex\": 3,\n        \"selectedLogoReasoning\": \"Selected #3 because it is a medium-sized logo with a wordmark shape, visible, and links to the homepage, making it the primary brand logo for Ultralight.\",\n        \"confidence\": 0.85\n      }\n    },\n    \"buttonClassification\": {\n      \"llmCalled\": true,\n      \"llmSucceeded\": true\n    }\n  }\n}\n```\n"
}