# Ultralight Brand Identity

A complete profile of **Ultralight**'s visual system — colors, typography, components, and personality — extracted from https://ultralig.ht. Built for designers, agents, and AI tools.

- Page: https://characterquilt.com/branding/ultralight
- Machine-readable JSON: https://characterquilt.com/branding/ultralight.json
- Per-page llms.txt: https://characterquilt.com/branding/ultralight/llms.txt

## Quick Facts

| Field | Value |
|---|---|
| Primary | #D6D4FF |
| Accent | #0A0B1C |
| Body Font | Roboto |
| Heading Font | Roboto |

## Color Palette

- primary: #D6D4FF
- secondary: #EAE9FF
- accent: #0A0B1C
- background: #090714
- textPrimary: #0A0B1C
- link: #0A0B1C

## Typography

- primary: Roboto — https://fonts.google.com/specimen/Roboto
- heading: Roboto — https://fonts.google.com/specimen/Roboto

## Visual Assets

- Logo: https://ultralig.ht/media/ul_logo_wordmark_sm.png
- Favicon: https://ultralig.ht/favicon-48x48.png

## UI Components

- 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
- 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

## Brand Personality

Tone: modern · Energy: medium · Audience: developers

## Ultralight Brand in the Wild

Real-world brand assets — ads, campaigns, marketing materials.

- **Architecture**
  - Image: https://files.readme.io/a9ddd98-library_design.png
  - Source: https://docs.ultralig.ht/docs/architecture
- **Ultralight 1.4 Out Now**
  - Image: https://ultralig.ht/media/blog/image-source-graphic.png
  - Source: https://ultralig.ht/blog/ultralight-1-4-out-now
- **Ultralight - Universal, Pure-GPU HTML Renderer**
  - Image: https://ultralig.ht/media/ul_logo.webp
  - Source: https://ultralig.ht/
- **Ultralight 1.4 Out Now**
  - Image: https://ultralig.ht/media/ul-1-4-graphic.png
  - Source: https://ultralig.ht/blog/ultralight-1-4-out-now
- **Ultralight - Universal, Pure-GPU HTML Renderer**
  - Image: https://ultralig.ht/media/logo-ubisoft.png
  - Source: https://ultralig.ht/
- **Ultralight - Universal, Pure-GPU HTML Renderer**
  - Image: https://ultralig.ht/media/base-memory-usage.webp
  - Source: https://ultralig.ht/

## 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": "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
    }
  }
}
```