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color-palette-extractor

Extract color palettes from images, websites, or designs. Identifies dominant colors, generates complementary schemes, and exports in multiple formats (HEX, RGB, HSL, Tailwind, CSS variables). Use when users need color schemes from images, brand colors, or design system palettes.

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SKILL.md(原文)

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Color Palette Extractor

Extract and generate color palettes from images, websites, and designs.

Instructions

When a user needs to extract colors from a source:

  1. Identify Source Type:

    • Image file (PNG, JPG, SVG)
    • Website URL
    • Screenshot
    • Design mockup
    • Existing color code to build palette from
  2. Extract Colors:

    From Image:

    • Analyze pixel data
    • Identify dominant colors
    • Group similar shades
    • Calculate color frequency
    • Sort by prominence

    From Website:

    • Fetch and parse CSS
    • Extract color values from stylesheets
    • Identify brand colors
    • Find accent colors
    • Detect text/background colors

    Color Clustering:

    • Use K-means clustering
    • Group similar colors
    • Typically extract 5-10 dominant colors
    • Ignore near-white/near-black unless significant
  3. Generate Color Palette:

    Primary Palette (5-10 colors):

    • Most dominant color
    • 2-3 supporting colors
    • 1-2 accent colors
    • Background color
    • Text color

    Extended Palette:

    • Light and dark variations
    • Tints (add white)
    • Shades (add black)
    • Tones (add gray)
    • Generate 50, 100, 200...900 scales
  4. Color Harmony Analysis:

    Generate complementary schemes:

    • Monochromatic: Variations of single hue
    • Analogous: Adjacent colors on wheel
    • Complementary: Opposite colors
    • Triadic: Three evenly spaced colors
    • Split-complementary: Base + two adjacent to complement
    • Tetradic: Four colors (two complementary pairs)
  5. Format Output:

    🎨 COLOR PALETTE EXTRACTOR
    
    Source: [Image/Website URL]
    
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    🎯 PRIMARY PALETTE
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    
    1. Primary Color
       HEX: #3B82F6
       RGB: rgb(59, 130, 246)
       HSL: hsl(217, 91%, 60%)
       Usage: Main brand color, primary buttons, links
       Prominence: 32%
    
    2. Secondary Color
       HEX: #8B5CF6
       RGB: rgb(139, 92, 246)
       HSL: hsl(258, 90%, 66%)
       Usage: Accent elements, hover states
       Prominence: 18%
    
    3. Background
       HEX: #F8FAFC
       RGB: rgb(248, 250, 252)
       HSL: hsl(210, 40%, 98%)
       Usage: Page background, cards
       Prominence: 25%
    
    4. Text Primary
       HEX: #1E293B
       RGB: rgb(30, 41, 59)
       HSL: hsl(217, 33%, 17%)
       Usage: Body text, headings
       Prominence: 15%
    
    5. Accent
       HEX: #10B981
       RGB: rgb(16, 185, 129)
       HSL: hsl(158, 84%, 39%)
       Usage: Success states, CTAs
       Prominence: 10%
    
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    🌈 COLOR SCALE (Tailwind-style)
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    
    Primary:
      50:  #EFF6FF  [lightest]
      100: #DBEAFE
      200: #BFDBFE
      300: #93C5FD
      400: #60A5FA
      500: #3B82F6  [base]
      600: #2563EB
      700: #1D4ED8
      800: #1E40AF
      900: #1E3A8A  [darkest]
      950: #172554
    
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    🎭 COLOR HARMONY SCHEMES
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    
    Complementary:
      Base: #3B82F6 (blue)
      Complement: #F6823B (orange)
    
    Analogous:
      #3B82F6 (blue)
      #3BF6D9 (cyan)
      #823BF6 (purple)
    
    Triadic:
      #3B82F6 (blue)
      #F6823B (orange)
      #82F63B (green)
    
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    💻 EXPORT FORMATS
    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
    
    CSS Variables:
    ```css
    :root {
      --color-primary: #3B82F6;
      --color-secondary: #8B5CF6;
      --color-background: #F8FAFC;
      --color-text: #1E293B;
      --color-accent: #10B981;
    }
    

    Tailwind Config:

    module.exports = {
      theme: {
        extend: {
          colors: {
            primary: {
              50: '#EFF6FF',
              500: '#3B82F6',
              900: '#1E3A8A',
            },
          }
        }
      }
    }
    

    SCSS Variables:

    $primary: #3B82F6;
    $secondary: #8B5CF6;
    $background: #F8FAFC;
    $text: #1E293B;
    $accent: #10B981;
    

    JSON:

    {
      "primary": "#3B82F6",
      "secondary": "#8B5CF6",
      "background": "#F8FAFC",
      "text": "#1E293B",
      "accent": "#10B981"
    }
    

    Android XML:

    <color name="primary">#3B82F6</color>
    <color name="secondary">#8B5CF6</color>
    

    iOS Swift:

    extension UIColor {
      static let primary = UIColor(hex: "3B82F6")
      static let secondary = UIColor(hex: "8B5CF6")
    }
    

    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ♿ ACCESSIBILITY CHECKS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

    Contrast Ratios (WCAG 2.1):

    Text on Background: #1E293B on #F8FAFC: 14.2:1 ✅ AAA (excellent)

    Primary on Background: #3B82F6 on #F8FAFC: 4.8:1 ✅ AA (good)

    White text on Primary: #FFFFFF on #3B82F6: 4.6:1 ✅ AA (good)

    Accent on Background: #10B981 on #F8FAFC: 3.2:1 ⚠️ AA Large text only

    Recommendations: • Use darker shade of accent for small text • Primary button text should be white (#FFFFFF) • Consider #047857 for better contrast

    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💡 COLOR PSYCHOLOGY ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

    Blue (#3B82F6): • Trust, professionalism, calm • Common for: Tech, finance, healthcare

    Purple (#8B5CF6): • Creativity, luxury, wisdom • Common for: Creative services, premium brands

    Green (#10B981): • Growth, success, health • Common for: Environmental, finance, wellness

    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎨 DESIGN SYSTEM INTEGRATION ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

    Suggested Usage: • Primary: Main CTAs, links, active states • Secondary: Secondary buttons, highlights • Background: Page/card backgrounds • Text: Body copy, headings • Accent: Success messages, highlights

    Color Roles: • Success: #10B981 (green accent) • Warning: #F59E0B (generate from palette) • Error: #EF4444 (generate complement) • Info: #3B82F6 (primary blue)

  6. Advanced Features:

    Color Blindness Simulation:

    • Test palette for:
      • Protanopia (red-blind)
      • Deuteranopia (green-blind)
      • Tritanopia (blue-blind)
    • Suggest adjustments for accessibility

    Mood Board:

    • Generate color combinations
    • Show usage examples
    • Create gradient options

    Brand Matching:

    • Compare to existing brand colors
    • Find closest brand matches
    • Suggest similar palettes

Example Triggers

  • "Extract colors from this screenshot"
  • "Get color palette from this website"
  • "Generate a color scheme from this image"
  • "Create Tailwind config from these colors"
  • "Find dominant colors in this logo"
  • "Build a palette from this hex code"

Best Practices

Color Extraction:

  • Filter out near-white/black unless prominent
  • Group similar colors (within 10% similarity)
  • Weight by visual importance (not just frequency)
  • Consider color psychology

Palette Generation:

  • Maintain color harmony
  • Ensure sufficient contrast
  • Generate semantic names (primary, accent, etc.)
  • Provide light and dark variations

Accessibility:

  • Check WCAG contrast ratios
  • Test with color blindness simulation
  • Recommend accessible alternatives
  • Ensure text readability

Export Formats:

  • Support common formats (CSS, Tailwind, iOS, Android)
  • Include usage guidelines
  • Provide example implementations

Output Quality

Ensure palettes:

  • Have clear dominant colors
  • Include sufficient variations
  • Pass accessibility checks
  • Come with usage guidelines
  • Export in multiple formats
  • Include color psychology notes
  • Show harmony schemes
  • Provide contrast ratios
  • Work for color-blind users
  • Have semantic naming

Generate professional, accessible color palettes ready for immediate use in design systems.

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