llms.txt

Simplex Brand Identity

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

Quick Facts

Field Value
Primary #1E293B
Accent #6366F1
Body Font Segoe UI
Heading Font Segoe UI

Color Palette

Typography

Visual Assets

UI Components

Brand Personality

Tone: professional · Energy: medium · Audience: healthcare professionals

Simplex 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 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

{
 "colorScheme": "dark",
 "fonts": [
  {
   "family": "Segoe UI",
   "role": "body"
  },
  {
   "family": "Roboto",
   "role": "body"
  },
  {
   "family": "Open Sans",
   "role": "body"
  },
  {
   "family": "Helvetica Neue",
   "role": "body"
  },
  {
   "family": "Ubuntu",
   "role": "body"
  }
 ],
 "colors": {
  "primary": "#1E293B",
  "secondary": "#374151",
  "accent": "#6366F1",
  "background": "#FFFFFF",
  "textPrimary": "#6366F1",
  "link": "#6366F1"
 },
 "typography": {
  "fontFamilies": {
   "primary": "Segoe UI",
   "heading": "Segoe UI"
  },
  "fontStacks": {
   "heading": [
    "GeistSans",
    "GeistSans Fallback",
    "-apple-system",
    "BlinkMacSystemFont",
    "Segoe UI",
    "Roboto",
    "Oxygen",
    "Ubuntu",
    "Cantarell",
    "Open Sans",
    "Helvetica Neue",
    "sans-serif"
   ],
   "body": [
    "-apple-system",
    "BlinkMacSystemFont",
    "Segoe UI",
    "Roboto",
    "Oxygen",
    "Ubuntu",
    "Cantarell",
    "Open Sans",
    "Helvetica Neue",
    "sans-serif"
   ],
   "paragraph": [
    "GeistSans",
    "GeistSans Fallback",
    "-apple-system",
    "BlinkMacSystemFont",
    "Segoe UI",
    "Roboto",
    "Oxygen",
    "Ubuntu",
    "Cantarell",
    "Open Sans",
    "Helvetica Neue",
    "sans-serif"
   ]
  },
  "fontSizes": {
   "h1": "48px",
   "h2": "60px",
   "body": "12px"
  }
 },
 "spacing": {
  "baseUnit": 4,
  "borderRadius": "3px"
 },
 "components": {
  "buttonPrimary": {
   "background": "#6366F1",
   "textColor": "#FFFFFF",
   "borderRadius": "0px",
   "borderRadiusCorners": {
    "topLeft": "0px",
    "topRight": "0px",
    "bottomRight": "0px",
    "bottomLeft": "0px"
   },
   "shadow": "rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px"
  },
  "buttonSecondary": {
   "background": "#FFFFFF",
   "textColor": "#6366F1",
   "borderRadius": "0px",
   "borderRadiusCorners": {
    "topLeft": "0px",
    "topRight": "0px",
    "bottomRight": "0px",
    "bottomLeft": "0px"
   },
   "shadow": "rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0) 0px 0px 0px 0px, rgba(0, 0, 0, 0.05) 0px 1px 2px 0px"
  }
 },
 "images": {
  "logo": null,
  "favicon": null,
  "ogImage": "https://simplex.sh/og-image.png"
 },
 "__llm_button_reasoning": {
  "primary": {
   "index": 0,
   "text": "Get Access",
   "reasoning": "Button #0 has a vibrant blue background (#6366F1), which is the brand's accent color, and the text 'Get Access' is action-oriented, making it the primary CTA."
  },
  "secondary": {
   "index": 1,
   "text": "Get Access",
   "reasoning": "Button #1 has a different background color (#FFFFFF) and serves as a secondary option with the same text 'Get Access', but in a less prominent style."
  },
  "confidence": 0.95
 },
 "personality": {
  "tone": "professional",
  "energy": "medium",
  "targetAudience": "healthcare professionals"
 },
 "designSystem": {
  "framework": "tailwind",
  "componentLibrary": ""
 },
 "confidence": {
  "buttons": 0.95,
  "colors": 0.9,
  "overall": 0.925
 },
 "__llm_metadata": {
  "logoSelection": {
   "llmCalled": false,
   "llmSucceeded": false,
   "finalSource": "none"
  },
  "buttonClassification": {
   "llmCalled": true,
   "llmSucceeded": true
  }
 }
}