F4 Brand Identity
A website-derived reference for F4: observed colors, typography, components, and assets extracted from https://f4.dev/. This snapshot is not official brand guidance. Verify current values and usage permissions with the original source.
Color Palette
Brand palette extracted from https://f4.dev/.
Typography
Each font links to its Google Fonts page where available.
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

UI Components
Live previews rendered using F4's actual button styles.
Brand Personality
F4 Brand in the Wild
Real-world brand assets, ads, campaigns, and marketing materials.
Frequently Asked Questions
What is F4's primary brand color?
The website extraction recorded #71621B as the primary color for F4. This is an observed website value, not a verified official brand specification.
What accent color does F4 use?
The website extraction recorded #F2CF2F as an accent color for F4. Check the source website or official brand guidelines before using it in new work.
What font does F4 use?
The extraction detected SF Pro Display as a primary typeface on https://f4.dev/. Other pages or materials may use different fonts.
Does F4 use a light or dark theme?
The captured website used a dark color scheme, with a recorded background of #08090A. The current website may differ from this snapshot.
Where can I find F4's logo?
The logo asset recorded from https://f4.dev/ is included in the machine-readable JSON profile linked above. Check the original source for the current asset and usage permissions.
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/ using the Firecrawl branding extraction API, which extracts website design information. An extraction date was not recorded for this profile. The source site may have changed since the snapshot was captured, and a redirect may lead to a different company or product. Brand-in-the-wild images were found using image search. Cached previews link to original third-party sources. 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": "https://f4.dev/",
"logoAlt": "https://f4.dev/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
}
}
} 