llms.txt

F4 Brand Identity

A complete profile of F4's visual system — colors, typography, components, and personality.

Quick Facts

Field Value
Primary #71621B
Accent #F2CF2F
Body Font SF Pro Display
Heading Font SF Pro Display

Color Palette

Typography

Visual Assets

UI Components

Brand Personality

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

F4 Brand in the Wild

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

Working with these fonts

Not found on Google Fonts? Agent Instructions that you can follow...

  1. Open the company's homepage in a browser with DevTools open.
  2. In the Network tab, filter by "Font".
  3. Hard-reload the page and click around.
  4. For each captured font URL: right-click → Save As to download the file locally.
  5. View the page's CSS and copy out the matching @font-face declarations.

Programmatic alternative: load the URL with Playwright or Puppeteer...

Machine-Readable Profile

{
 "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%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"
 },
 "__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
 }
 }
}