# AI Website Detector design system

> AI Website Detector design system measured from aiwebsitedetector.com: #36309A primary on #F9FAFB, 17 color hex codes, type scale, spacing and a free DESIGN.md.

Canonical page: https://sitepeel.dev/design-md/aiwebsitedetector.com/

AI Website Detector’s website (aiwebsitedetector.com) uses the visitor’s system fonts and #36309A as its main color on a #F9FAFB background. Measured by Sitepeel on November 7, 2026.

## What font does AI Website Detector use?

AI Website Detector uses the visitor’s system fonts on aiwebsitedetector.com: no web font was measured. Measured on November 7, 2026.

- system-ui (weights 400, 500, 600, 700)

## AI Website Detector colors: palette and hex codes

AI Website Detector’s main colors are #F9FAFB (snow) for the background, #4B5563 (dark blue) for text and #36309A (indigo) as the main accent, with #4F46E5 (indigo) and #462797 (dark violet) as other accents. Measured on November 7, 2026.

- #F9FAFB: snow
- #4B5563: dark blue
- #111827: deep blue
- #374151: dark blue
- #9CA3AF: blue
- #FFFFFF: white
- #F3F4F6: snow
- #EEF2FF: cool snow

## What is AI Website Detector built with?

AI Website Detector’s website (aiwebsitedetector.com) is built with Next.js, React, Tailwind CSS and Lucide. Measured on November 7, 2026.

- JavaScript framework: Next.js 16.1.6, React 19.3.0-canary-f93b9fd4-2
- UI & CSS: Tailwind CSS 3.x
- Fonts & icons: Lucide

## Questions and answers

### What font does AI Website Detector use?

No web font was measured on aiwebsitedetector.com: it uses the visitor’s system fonts.

### What are the AI Website Detector colors and hex codes?

On aiwebsitedetector.com: #F9FAFB (snow) for the background, #4B5563 (dark blue) for text and #36309A (indigo) as the main accent, with #4F46E5 (indigo) and #462797 (dark violet) as other accents. The color palette above lists all 17 colors with their hex codes and where each one is used.

### What is the AI Website Detector design system?

The design system on this page is aiwebsitedetector.com’s, as measured on November 7, 2026: #36309A as the main color and pill-shaped corners, written down as a DESIGN.md. It is not AI Website Detector’s own documentation.

### What is AI Website Detector built with?

AI Website Detector’s website (aiwebsitedetector.com) is built with Next.js, React, Tailwind CSS and Lucide. Measured on November 7, 2026.

### What is the AI Website Detector DESIGN.md?

A plain-text file with AI Website Detector’s measured colors, type, spacing, corners and components as tokens, plus short rules, in the DESIGN.md format Google published with Stitch. Your AI coding agent reads it and builds in this style. More about DESIGN.md.

### How do I use it with Claude Code or Cursor?

Download the file and put it in your project’s root folder, then ask your agent to follow DESIGN.md. Step-by-step guides: Claude Code, Cursor, Codex, GitHub Copilot.

### Is this AI Website Detector’s official design system?

No. Sitepeel measured it from aiwebsitedetector.com’s public page on November 7, 2026. It is an independent analysis, not made or approved by AI Website Detector.

### Can I use AI Website Detector’s style in my own product?

Use it to learn, prototype and compare. For a real product, make the style your own, and never copy AI Website Detector’s logo, name, pictures or text.

### How accurate are the values?

Each value was measured on the rendered page after it fully loaded, on desktop and mobile: colors where they appear, type with tracking, spacing, corners, shadows and hover states. Sites change, so check the date at the top.

## Files

- [DESIGN.md](https://sitepeel.dev/design-md/aiwebsitedetector.com/DESIGN.md): the plain file to put in your project.
- [All brand DESIGN.md files](https://sitepeel.dev/design-md/examples/index.md)

Independent analysis by Sitepeel (sitepeel.dev), not affiliated with AI Website Detector.

## The DESIGN.md file

```markdown
---
version: alpha
name: AI Website Detector
description: "Light interface measured from aiwebsitedetector.com: system-ui type, indigo accents, tonal surfaces and pill-shaped controls."
colors:
  background: "#F9FAFB"
  surface: "#F9FAFB"
  on-surface: "#4B5563"
  on-background: "#4B5563"
  on-surface-strong: "#111827"
  on-surface-variant: "#374151"
  on-surface-muted: "#9CA3AF"
  surface-container-low: "#FFFFFF"
  surface-container: "#F3F4F6"
  surface-container-high: "#EEF2FF"
  surface-container-highest: "#E0E7FF"
  overlay: "#FFFFFF1A"
  outline: "#E5E7EB"
  outline-variant: "#FFFFFF33"
  primary: "#36309A"
  on-primary: "#FFFFFF"
  secondary: "#4F46E5"
  tertiary: "#462797"
  success: "#4ADE80"
typography:
  headline-display:
    fontFamily: system-ui
    fontSize: 60px
    fontWeight: 700
    lineHeight: 1
  headline-lg:
    fontFamily: system-ui
    fontSize: 30px
    fontWeight: 700
    lineHeight: 1.2
  headline-md:
    fontFamily: system-ui
    fontSize: 24px
    fontWeight: 700
    lineHeight: 1.33
  body-md:
    fontFamily: system-ui
    fontSize: 14px
    fontWeight: 400
    lineHeight: 1.43
  body-lg:
    fontFamily: system-ui
    fontSize: 16px
    fontWeight: 400
    lineHeight: 1.5
  label-lg:
    fontFamily: system-ui
    fontSize: 16px
    fontWeight: 600
    lineHeight: 1.5
  label-md:
    fontFamily: system-ui
    fontSize: 14px
    fontWeight: 500
    lineHeight: 1.43
  label-sm:
    fontFamily: system-ui
    fontSize: 12px
    fontWeight: 400
    lineHeight: 1.63
  headline-display-mobile:
    fontFamily: system-ui
    fontSize: 36px
    fontWeight: 700
    lineHeight: 1.25
rounded:
  sm: 4px
  md: 8px
  lg: 12px
  xl: 16px
  full: 9999px
spacing:
  xs: 4px
  sm: 8px
  md: 10px
  lg: 24px
  xl: 40px
  gutter: 8px
  section: 64px
  margin: 24px
  container: 1152px
components:
  button-outline:
    backgroundColor: "{colors.surface-container}"
    textColor: "{colors.on-surface-variant}"
    typography: "{typography.label-md}"
    rounded: "{rounded.full}"
    padding: 6px 12px
    height: 32px
  button-secondary:
    backgroundColor: "{colors.secondary}"
    textColor: "{colors.on-primary}"
    typography: "{typography.label-md}"
    rounded: "{rounded.md}"
    padding: 8px 16px
    height: 36px
  button-secondary-hover:
    backgroundColor: "#4338CA"
  button-ghost:
    backgroundColor: "{colors.overlay}"
    textColor: "#C7D2FE"
    typography: "{typography.label-sm}"
    rounded: "{rounded.full}"
    padding: 4px 10px
    height: 26px
  input-field:
    backgroundColor: "{colors.surface-container-low}"
    textColor: "{colors.on-surface-strong}"
    typography: "{typography.body-lg}"
    rounded: "{rounded.lg}"
    padding: 16px 16px 16px 48px
  link:
    textColor: "{colors.on-surface-muted}"
---

# AI Website Detector Design System

## Overview

AI Website Detector describes itself as: “Free AI website detector — paste any URL to instantly check if it was built with Lovable, Bolt, Framer AI, Durable, Wix ADI, or 80+ AI builders. Get an AI probability score, verdict, and full tech-stack breakdown.” The interface is light, built on **Snow (#F9FAFB)** with **Dark Blue (#4B5563)** text, and **Indigo (#36309A)** as the main accent.

Type is set in **system-ui**. Headlines run large; body text is 14px. Depth comes from soft drop shadows. Controls are pill-shaped.

Measured from [aiwebsitedetector.com](https://aiwebsitedetector.com/) on November 7, 2026 at 1440×900 and 390×844 from 387 rendered elements. Values are computed styles from the live page, not the original source files.

## Colors

The palette has 17 roles, plus gradient stops #312E81, #3730A3, #581C87.

- **Snow (#F9FAFB):** Page background, seen 4 times. Token `background`.
- **Dark Blue (#4B5563):** Primary text and headings, seen 36 times. Token `on-surface`.
- **Deep Blue (#111827):** Headings and emphasis, seen 32 times. Token `on-surface-strong`.
- **Dark Blue (#374151):** Secondary text, seen 16 times. Token `on-surface-variant`.
- **Blue (#9CA3AF):** Muted text and metadata, seen 44 times. Token `on-surface-muted`.
- **White (#FFFFFF):** Raised areas one step from the page, seen 24 times. Token `surface-container-low`, CSS `--background`.
- **Snow (#F3F4F6):** Cards and panels, seen 9 times. Token `surface-container`.
- **Cool Snow (#EEF2FF):** Hover and pressed fills, seen 6 times. Token `surface-container-high`.
- **Pale Blue (#E0E7FF):** Highest raised elements, seen 2 times. Token `surface-container-highest`.
- **White 10% (#FFFFFF1A):** Translucent fill for cards and controls, seen 9 times. Token `overlay`.
- **Cool Mist (#E5E7EB):** Borders and dividers, seen 22 times. Token `outline`.
- **White 20% (#FFFFFF33):** Secondary dividers, seen 9 times. Token `outline-variant`.
- **Indigo (#36309A):** Brand color in logos and imagery. Token `primary`.
- **White (#FFFFFF):** Text and icons on primary. Token `on-primary`.
- **Indigo (#4F46E5):** Secondary buttons, seen 28 times. Token `secondary`.
- **Dark Violet (#462797):** Accent in logos and imagery. Token `tertiary`.
- **Green (#4ADE80):** Success and positive states, seen 5 times. Token `success`.

## Typography

**system-ui** carries the whole interface. Fallback stack: `-apple-system, BlinkMacSystemFont, Segoe UI, Roboto`.

- **headline-display:** system-ui 60px at weight 700, line height 1 (36px on mobile). Page title (h1).
- **headline-lg:** system-ui 30px at weight 700, line height 1.2. Section headings (h2).
- **headline-md:** system-ui 24px at weight 700, line height 1.33. Sub-section headings.
- **body-md:** system-ui 14px at weight 400, line height 1.43. Body text.
- **body-lg:** system-ui 16px at weight 400, line height 1.5. Lead paragraphs.
- **label-lg:** system-ui 16px at weight 600, line height 1.5. Large buttons and tabs.
- **label-md:** system-ui 14px at weight 500, line height 1.43. Buttons, navigation and labels.
- **label-sm:** system-ui 12px at weight 400, line height 1.63. Small labels and badges.

## Layout

Spacing is mostly on a 4px grid (81% of measured values), with some off-grid steps. Match the measured scale rather than rounding everything.

- **Scale:** xs 4px, sm 8px, md 10px, lg 24px, xl 40px.
- **Sections:** 64px vertical padding between major sections.
- **Gaps:** 8px is the most common gap in flex and grid layouts.
- **Container:** content is capped at 1152px.
- **Page margin:** 24px on each side of full-width sections.
- **Breakpoints:** 640px, 768px, 1024px, 1280px, 1536px.

## Elevation & Depth

Raised elements use soft drop shadows. The most used recipes:

- `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`

## Shapes

Interactive controls are pill-shaped. Measured radii, most used first:

- **full (9999px):** 92 elements.
- **xl (16px):** 48 elements.
- **sm (4px):** 36 elements.
- **lg (12px):** 16 elements.
- **md (8px):** 8 elements.

## Components

Measured from the rendered page. Token values reference the tokens above.

- **button-outline (“Framer”):** #F3F4F6 fill, #374151 text, 14px/500, 9999px radius, padding 6px 12px.
- **button-secondary (“Detect a Site”):** #4F46E5 fill, #FFFFFF text, 14px/500, 8px radius, padding 8px 16px.
- **button-secondary-hover:** background #4338CA, text #FFFFFF on hover.
- **button-ghost (“nctmediagroup.com”):** #FFFFFF1A fill, #C7D2FE text, 12px/400, 9999px radius, padding 4px 10px, border 1px solid #FFFFFF33.
- **input-field (“Enter website URL (e.g. example.”):** #FFFFFF fill, #111827 text, 16px/400, 12px radius, padding 16px 16px 16px 48px, border 1px solid #E5E7EB, 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`.
- **link:** transparent fill, #9CA3AF text, padding 0px.

## Do's and Don'ts

- Do use #F9FAFB for the page and lift surfaces in small steps: #FFFFFF, #F3F4F6, #EEF2FF, #E0E7FF.
- Do keep text in 4 levels: #4B5563, #111827, #374151, #9CA3AF.
- Do use #36309A as the brand accent: header, logo and key highlights.
- Do reuse the measured spacing steps (8px, 10px, 24px).
- Do make buttons and chips fully rounded (9999px); most other elements use 16px corners.
- Don't use #9CA3AF for body text; it reaches 2.43:1 on #F9FAFB. Keep it for large text or metadata.
- Don't introduce new font families beyond system-ui.
- Don't use #36309A for large backgrounds or body text.
- Don't make interface transitions slower than 0.15s.

## Motion

Interface transitions are quick: 0.15s. Longer ambient animations run 2s.

- **Easing:** `cubic-bezier(0.4, 0, 0.2, 1)`, `cubic-bezier(0.4, 0, 0.6, 1)`.

Generated by [Sitepeel](https://sitepeel.dev/design-md/aiwebsitedetector.com/), the free DESIGN.md generator (engine 2026.10.29+b828a475ee10).

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