Y Combinator Brand Identity
A complete profile of Y Combinator's visual system — colors, typography, components, and personality — extracted from https://www.ycombinator.com. Built for designers, agents, and AI tools.
Color Palette
Brand palette extracted from https://www.ycombinator.com.
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 Y Combinator's actual button styles.
Brand Personality
Y Combinator Brand in the Wild
Real-world brand assets — ads, campaigns, and marketing materials.
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Frequently Asked Questions
What is Y Combinator's primary brand color?
Y Combinator's primary brand color is #8A8575. It anchors the visual identity across their website, product UI, and marketing materials.
What accent color does Y Combinator use?
Y Combinator uses #B22222 as an accent color, typically applied to interactive elements like links, buttons, and call-to-action emphasis.
What font does Y Combinator use?
Y Combinator uses Source Serif 4 as the primary typeface across body and headings.
Does Y Combinator use a light or dark theme?
Y Combinator's primary site uses a light color scheme, with a background of #F5F5EE.
Where can I find Y Combinator's logo?
Y Combinator's logo is available directly on their site (https://www.ycombinator.com). 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://www.ycombinator.com 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 Y Combinator.
Methodology
Brand data on this page was extracted from https://www.ycombinator.com 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 Y Combinator.
Machine-Readable Profile
Direct endpoints for agents, designers, and tooling. No login or auth required.
{
"colorScheme": "light",
"fonts": [
{
"family": "Outfit",
"role": "unknown"
},
{
"family": "Source Serif 4",
"role": "body"
}
],
"colors": {
"primary": "#8A8575",
"secondary": "#F26522",
"accent": "#B22222",
"background": "#F5F5EE",
"textPrimary": "#16140F",
"link": "#B22222"
},
"typography": {
"fontFamilies": {
"primary": "Source Serif 4",
"heading": "Source Serif 4"
},
"fontStacks": {
"heading": [
"Outfit",
"ui-sans-serif",
"system-ui",
"sans-serif",
"Apple Color Emoji",
"Segoe UI Emoji",
"Segoe UI Symbol",
"Noto Color Emoji"
],
"body": [
"Outfit",
"ui-sans-serif",
"system-ui",
"sans-serif",
"Apple Color Emoji",
"Segoe UI Emoji",
"Segoe UI Symbol",
"Noto Color Emoji"
],
"paragraph": [
"Outfit",
"sans-serif"
]
},
"fontSizes": {
"h1": "16px",
"h2": "11.2px",
"body": "14px"
}
},
"spacing": {
"baseUnit": 4,
"borderRadius": "5px"
},
"components": {
"buttonPrimary": {
"background": "#000000",
"textColor": "#F5F5EE",
"borderRadius": "33554400px",
"borderRadiusCorners": {
"topLeft": "33554400px",
"topRight": "33554400px",
"bottomRight": "33554400px",
"bottomLeft": "33554400px"
},
"shadow": "none"
},
"buttonSecondary": {
"background": "#F5F5EE",
"textColor": "#8A8575",
"borderRadius": "0px",
"borderRadiusCorners": {
"topLeft": "0px",
"topRight": "0px",
"bottomRight": "0px",
"bottomLeft": "0px"
},
"shadow": "none"
}
},
"images": {
"logo": "data:image/svg+xml,%3csvg%20width='48'%20height='48'%20viewBox='0%200%2048%2048'%20fill='none'%20xmlns='http://www.w3.org/2000/svg'%3e%3cpath%20d='M47.9985%2047.9994H0V8.61853e-07H47.9985V47.9994Z'%20fill='%23FF6600'/%3e%3cpath%20d='M13.9012%2011.7843H17.6595L22.4961%2021.5325C23.203%2022.9836%2023.7984%2024.3976%2023.7984%2024.3976C23.7984%2024.3976%2024.4313%2023.021%2025.175%2021.5325L30.0868%2011.7843H33.5843L25.2865%2027.3746V37.309H22.1244V27.1884L13.9012%2011.7843Z'%20fill='white'/%3e%3c/svg%3e",
"favicon": "https://bookface-static.ycombinator.com/assets/ycdc/favicon-c8a914eeeba9fe6f7a863b35608b55aeedd7c1ff409c97b9ecb96b7a6c278d70.ico",
"ogImage": "https://www.ycombinator.com/assets/ycdc/yc-og-image-c440a0ad1dacfb86eeeb343717479cc54d256614449b4ef719977a0a451f8bc8.png",
"logoHref": "/",
"logoAlt": "Y Combinator"
},
"__llm_logo_reasoning": {
"selectedIndex": 0,
"reasoning": "Selected #0 because it is visible, located in the header, links to the homepage, and has an alt text matching the brand 'Y Combinator'.",
"confidence": 0.9,
"source": "llm"
},
"__llm_button_reasoning": {
"primary": {
"index": 14,
"text": "Apply",
"reasoning": "Button #0 with text 'Apply' is the primary CTA due to its distinct dark background color (#000000) and action-oriented text, making it stand out as the main call-to-action."
},
"secondary": {
"index": 0,
"text": "$1.3 Trillionin combined valuation",
"reasoning": "Button #1 is selected as secondary because it has a different background color (#F5F5EE) and serves as a less prominent informational button."
},
"confidence": 0.95
},
"personality": {
"tone": "professional",
"energy": "medium",
"targetAudience": "startups and entrepreneurs"
},
"designSystem": {
"framework": "tailwind",
"componentLibrary": ""
},
"confidence": {
"buttons": 0.95,
"colors": 0.9,
"overall": 0.925
},
"__llm_metadata": {
"logoSelection": {
"llmCalled": true,
"llmSucceeded": true,
"finalSource": "llm",
"rawLogoSelection": {
"selectedLogoIndex": 0,
"selectedLogoReasoning": "Selected #0 because it is visible, located in the header, links to the homepage, and has an alt text matching the brand 'Y Combinator'.",
"confidence": 0.9
}
},
"buttonClassification": {
"llmCalled": true,
"llmSucceeded": true
}
}
}