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F4 Brand Identity

A complete profile of F4's visual system — colors, typography, components, and personality — extracted from https://f4.dev/. Built for designers, agents, and AI tools.

Download JSON
Primary
#71621B
Accent
#F2CF2F
Body Font
SF Pro Display
Heading
SF Pro Display

Color Palette

Brand palette extracted from https://f4.dev/.

primary
#71621B
rgb(113, 98, 27)
secondary
#4A4014
rgb(74, 64, 20)
accent
#F2CF2F
rgb(242, 207, 47)
background
#08090A
rgb(8, 9, 10)
textPrimary
#08090A
rgb(8, 9, 10)
link
#F2CF2F
rgb(242, 207, 47)

Typography

Each font links to its Google Fonts page where available.

primary
SF Pro Display
SF Pro Display Google Fonts →
heading
SF Pro Display
SF Pro Display Google Fonts →
-apple-system, BlinkMacSystemFont, SF Pro Display, SF Pro, Segoe UI, system-ui, sans-serif
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.

Visual Assets

F4 logo
Logo
F4 favicon
Favicon
F4 social image
Social Card

UI Components

Live previews rendered using F4's actual button styles.

buttonPrimary
background #141515 textColor #08090A borderColor #71621B borderRadius 9999px shadow rgba(242, 207, 47, 0.18) 0px 18px 48px 0px
buttonSecondary
background transparent textColor #08090A borderColor #71621B borderRadius 9999px shadow rgba(242, 207, 47, 0.18) 0px 18px 48px 0px

Brand Personality

Tone: professional Energy: medium Audience: engineers and technical professionals

F4 Brand in the Wild

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

Frequently Asked Questions

What is F4's primary brand color?

F4's primary brand color is #71621B. It anchors the visual identity across their website, product UI, and marketing materials.

What accent color does F4 use?

F4 uses #F2CF2F as an accent color, typically applied to interactive elements like links, buttons, and call-to-action emphasis.

What font does F4 use?

F4 uses SF Pro Display as the primary typeface across body and headings.

Does F4 use a light or dark theme?

F4's primary site uses a dark color scheme, with a background of #08090A.

Where can I find F4's logo?

F4's logo is available directly on their site (https://f4.dev/). The current logo URL is included in the machine-readable JSON profile linked above.

How was this brand profile generated?

This profile was extracted from https://f4.dev/ using the Firecrawl branding extraction API, which inspects the live page's CSS, fonts, color tokens, and component styles. It is not affiliated with or endorsed by F4.

Methodology

Brand data on this page was extracted from https://f4.dev/ on using the Firecrawl branding extraction API, which inspects each site's live CSS, font network requests, color tokens, and component styles. Brand-in-the-wild images were sourced via Google Image Search restricted to ad/webinar/report queries and link out to their original third-party publishers; we link to the source rather than re-hosting third-party content. This page is published by CharacterQuilt and is not affiliated with or endorsed by F4.

Machine-Readable Profile

Direct endpoints for agents, designers, and tooling. No login or auth required.

{
  "colorScheme": "dark",
  "fonts": [
    {
      "family": "SF Pro Display",
      "role": "body"
    },
    {
      "family": "SF Pro",
      "role": "body"
    },
    {
      "family": "SF Mono",
      "role": "monospace"
    },
    {
      "family": "Fira Code",
      "role": "monospace"
    },
    {
      "family": "Segoe UI",
      "role": "body"
    }
  ],
  "colors": {
    "primary": "#71621B",
    "secondary": "#4A4014",
    "accent": "#F2CF2F",
    "background": "#08090A",
    "textPrimary": "#08090A",
    "link": "#F2CF2F"
  },
  "typography": {
    "fontFamilies": {
      "primary": "SF Pro Display",
      "heading": "SF Pro Display"
    },
    "fontStacks": {
      "heading": [
        "-apple-system",
        "BlinkMacSystemFont",
        "SF Pro Display",
        "SF Pro",
        "Segoe UI",
        "system-ui",
        "sans-serif"
      ],
      "body": [
        "-apple-system",
        "BlinkMacSystemFont",
        "SF Pro Display",
        "SF Pro",
        "Segoe UI",
        "system-ui",
        "sans-serif"
      ],
      "paragraph": [
        "-apple-system",
        "BlinkMacSystemFont",
        "SF Pro Display",
        "SF Pro",
        "Segoe UI",
        "system-ui",
        "sans-serif"
      ]
    },
    "fontSizes": {
      "h1": "60px",
      "h2": "60px",
      "body": "18px"
    }
  },
  "spacing": {
    "baseUnit": 4,
    "borderRadius": "28px"
  },
  "components": {
    "buttonPrimary": {
      "background": "#141515",
      "textColor": "#08090A",
      "borderColor": "#71621B",
      "borderRadius": "9999px",
      "borderRadiusCorners": {
        "topLeft": "9999px",
        "topRight": "9999px",
        "bottomRight": "9999px",
        "bottomLeft": "9999px"
      },
      "shadow": "rgba(242, 207, 47, 0.18) 0px 18px 48px 0px"
    },
    "buttonSecondary": {
      "background": "transparent",
      "textColor": "#08090A",
      "borderColor": "#71621B",
      "borderRadius": "9999px",
      "borderRadiusCorners": {
        "topLeft": "9999px",
        "topRight": "9999px",
        "bottomRight": "9999px",
        "bottomLeft": "9999px"
      },
      "shadow": "rgba(242, 207, 47, 0.18) 0px 18px 48px 0px"
    }
  },
  "images": {
    "logo": "data:image/svg+xml,%3csvg%20xmlns='http://www.w3.org/2000/svg'%20width='100%25'%20height='100%25'%20viewBox='0%200%2016%2016'%20role='img'%20aria-label='F4%20Logo'%3e%3c!--%20Simplified%20for%20QtSvg%20compatibility:%20use%206-digit%20hex%20colors%20(QtSvg%20may%20ignore%208-digit)%20--%3e%3ctitle%3eF4%20Logo%3c/title%3e%3cpath%20fill='%23ffffff'%20d='M5.879%208.83c.76%200%201.378.617%201.376%201.378l-.011%205.797H5.386V13.85a.43.43%200%200%200-.43-.43h-2.53v-1.525h2.537a.43.43%200%200%200%20.43-.431v-.724a.43.43%200%200%200-.43-.43H.002V8.83h5.877Zm10.142%201.48H11.06a.43.43%200%200%200-.43.43v.724c0%20.237.193.43.43.43h2.538v1.526h-2.53a.43.43%200%200%200-.43.43v2.155h-1.86l-.012-5.797a1.377%201.377%200%200%201%201.377-1.379h5.877v1.481Zm-5.385-8.15c0%20.238.194.43.431.43h2.53v1.525H11.06a.43.43%200%200%200-.43.43v.725c0%20.237.193.43.43.43h4.962v1.482h-5.877a1.377%201.377%200%200%201-1.377-1.38L8.78.005h1.857V2.16Zm-3.38%203.642A1.377%201.377%200%200%201%205.878%207.18H.002V5.699h4.962a.43.43%200%200%200%20.43-.43v-.723a.43.43%200%200%200-.43-.43h-2.54V2.59h2.53a.43.43%200%200%200%20.431-.43V.005h1.858l.011%205.797Z'/%3e%3c/svg%3e",
    "favicon": "https://f4.dev/favicon.svg",
    "ogImage": "https://f4.dev/social/og-default-1200x630.png",
    "logoHref": "/",
    "logoAlt": "F4"
  },
  "__llm_logo_reasoning": {
    "selectedIndex": 0,
    "reasoning": "Selected #0 because it is located in the header, is visible, and links to the homepage, matching the brand 'F4 Industries'.",
    "confidence": 0.9,
    "source": "llm"
  },
  "__llm_button_reasoning": {
    "primary": {
      "index": 1,
      "text": "Contact Sales",
      "reasoning": "Button #1 'Contact Sales' is marked as primary and has a distinct background color (#141515) with a border color matching the primary brand color (#71621B), indicating its importance as a CTA."
    },
    "secondary": {
      "index": 5,
      "text": "Go to Downloads",
      "reasoning": "Button #5 'Go to Downloads' has a transparent background, making it a suitable secondary action with a different color group from the primary button."
    },
    "confidence": 0.9
  },
  "personality": {
    "tone": "professional",
    "energy": "medium",
    "targetAudience": "engineers and technical professionals"
  },
  "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, is visible, and links to the homepage, matching the brand 'F4 Industries'.",
        "confidence": 0.9
      }
    },
    "buttonClassification": {
      "llmCalled": true,
      "llmSucceeded": true
    }
  }
}

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