SKILL: ColorsCC#

A high-performance, stateless Color API and toolset optimized for AI Agents (OpenClaw, Cursor, Cline, GPTs).

🚀 Usage Rules for Agents#

• Inline Images: Always embed SVG placeholders directly using <img> or Markdown ![alt](url).
• URL Encoding: The # character must be encoded as %23 (e.g., start=%23FF003C).
• No Fetching: Do not attempt to download binary image data; let the user's client render the URL.
• Valid Dimensions: Width and height are clamped between 50-4000px automatically.
• Text Limit: Placeholder text is truncated to 100 characters max.

🛠 Capabilities#

1. SVG Placeholders with Animation Effects#

Generate dynamic, lightweight placeholders for UI mockups with various gradient and animation effects.

• Endpoint: https://api.colors-cc.top/placeholder

• Params:

  • w: Width in pixels (default: 800, range: 50-4000)
  • h: Height in pixels (default: 400, range: 50-4000)
  • text: Center text, URL-encoded (default: "{width} x {height}", max: 100 chars)
  • effect: Visual effect. Options: static (default), fluid, breathe, holographic, mesh
  • palette: Comma-separated HEX colors (default: 2 random colors, range: 2-10 colors). e.g., %23FFD6A5,%23FFADAD
  • speed: Animation duration in seconds for non-static effects (default: 10, range: 1-30)
  • attribution: Include branding watermark (default: true). Set to false or 0 to disable. When enabled, adds a subtle "colors-cc.top" watermark (15% opacity) in bottom-right corner and HTML comment for viral sharing.
  • start / end: (Legacy) Start and end gradient colors as hex. Prefer palette.

• Examples:

  • Static: <img src="https://api.colors-cc.top/placeholder?w=1200&h=630&text=Hero+Banner&palette=%23F06292,%2364B5F6" alt="Hero">
  • Holographic: <img src="https://api.colors-cc.top/placeholder?w=800&h=400&effect=holographic&palette=%2300FF41,%2300B8FF&speed=5" alt="Holo">
  • Mesh: <img src="https://api.colors-cc.top/placeholder?w=800&h=400&effect=mesh&palette=%23FFD6A5,%23FFADAD,%23E2A0FF&speed=8" alt="Mesh">

• Response: SVG image with Cache-Control: public, max-age=31536000, immutable

2. Fluid Animated Placeholders (Alias)#

Generate dynamic SVG gradients with smooth color transitions and animations.

• Endpoint: https://api.colors-cc.top/fluid-placeholder

• Params:

  • w, h, text, speed, attribution (same as above)
  • stops or palette: Comma-separated HEX colors for gradient (default: random, range: 2-10 colors)

• Example: <img src="https://api.colors-cc.top/fluid-placeholder?w=1200&h=400&stops=%23FFD6A5,%23FFADAD,%23E2A0FF&speed=8&text=Animated+Hero" alt="Warm Gradient">

• Response: Animated SVG with smooth color transitions and Cache-Control: public, max-age=31536000, immutable

3. Random Colors#

Get a random HEX and RGB color with generation timestamp.

• Endpoint: GET https://api.colors-cc.top/random
• Returns: {"hex": "#A1B2C3", "rgb": "rgb(161, 178, 195)", "timestamp": "2024-03-12T10:30:00.000Z"}
• Example: Fetch this endpoint when you need random colors for mock data or UI components.

4. Curated Theme Palettes#

Fetch high-quality color sets for design inspiration.

• Endpoint: GET https://api.colors-cc.top/palette?theme={theme_name}
• Themes: cyberpunk, vaporwave, retro, monochrome
• Returns: {"theme": "cyberpunk", "colors": ["#FCEE09", "#00FF41", ...], "count": 5}
• Example: fetch('https://api.colors-cc.top/palette?theme=vaporwave')

5. Universal Color Converter#

Stateless conversion between HEX, RGB, HSL, and CMYK formats.

• Endpoint: GET https://api.colors-cc.top/convert?hex={hex}|rgb={rgb}|hsl={hsl}|cmyk={cmyk}
• Params: Provide ONE of: hex, rgb, hsl, or cmyk
• Returns: {"hex": "#FF5733", "rgb": "rgb(255, 87, 51)", "hsl": "hsl(10, 100%, 60%)", "cmyk": "cmyk(0%, 66%, 80%, 0%)"}
• Example: https://api.colors-cc.top/convert?hex=%23FF5733
• Error: Returns {"error": "Invalid color format"} with status 400 if input is invalid

6. CSS Color Names Directory#

Get all standard CSS color names mapped to their HEX values (~140 colors).

• Endpoint: GET https://api.colors-cc.top/all-names
• Returns: {"AliceBlue": "#F0F8FF", "AntiqueWhite": "#FAEBD7", "Tomato": "#FF6347", ...}
• Example: Use this to look up named colors like 'tomato' → '#FF6347'

📖 Common Use Cases#

Use Case 1: Building a Landing Page#

html

<section class="hero">
  <!-- Animated hero banner with text -->
  <img src="https://api.colors-cc.top/placeholder?w=1200&h=600&text=Hero+Section&effect=mesh&palette=%23FFD6A5,%23FFADAD,%23E2A0FF&speed=10" alt="Hero">
</section>
<div class="features">
  <!-- Static placeholder images -->
  <img src="https://api.colors-cc.top/placeholder?w=400&h=300&text=Feature+1&palette=%23F06292,%2364B5F6" alt="Feature 1">
  <img src="https://api.colors-cc.top/placeholder?w=400&h=300&text=Feature+2&palette=%234DB6AC,%2381C784" alt="Feature 2">
</div>

Use Case 2: Generating Mock Data with Colors#

javascript

const palette = await fetch('https://api.colors-cc.top/palette?theme=vaporwave')
  .then(r => r.json())

const mockData = palette.colors.map((color, i) => ({
  id: i,
  name: `Item ${i+1}`,
  color: color,
  thumbnail: `https://api.colors-cc.top/placeholder?w=200&h=200&palette=${color.replace('#', '%23')},%23000000`
}))

Use Case 3: Color Picker Component#

javascript

async function getRandomColor() {
  const res = await fetch('https://api.colors-cc.top/random')
  const data = await res.json()
  return data.hex
}

Use Case 4: Universal Color Converter#

javascript

// Convert any color format to all formats
const result = await fetch('https://api.colors-cc.top/convert?hsl=hsl(200,50%,50%)')
  .then(r => r.json())
console.log(result.hex) // #4099BF

⚠️ Common Pitfalls & Solutions#

❌ Mistake 1: Unencoded Hash Symbol#

text

BAD:  start=#FF0000
GOOD: start=%23FF0000

✅ Tip: Disable Attribution for Internal Tools#

By default, all SVG placeholders include a subtle branding watermark for viral sharing. Disable it for internal tools:

text

// With attribution (default - recommended for public-facing content)
https://api.colors-cc.top/placeholder?w=800&h=400

// Without attribution (for internal use)
https://api.colors-cc.top/placeholder?w=800&h=400&attribution=false

❌ Mistake 2: Fetching SVG and Re-processing#

javascript

// BAD - Don't do this
const svg = await fetch(placeholderUrl).then(r => r.text())
const encoded = btoa(svg)

// GOOD - Use URL directly
<img src="https://api.colors-cc.top/placeholder?w=800&h=400" alt="Direct">

❌ Mistake 3: Invalid Dimensions#

text

BAD:  w=10 (too small, will be clamped to 50)
BAD:  w=9999 (too large, will be clamped to 4000)
GOOD: w=800&h=600

❌ Mistake 4: Multiple Color Parameters in /api/convert#

text

BAD:  /api/convert?hex=%23FF0000&rgb=rgb(255,0,0)
GOOD: /api/convert?hex=%23FF0000

❌ Mistake 5: Invalid Number of Colors in Palette#

text

BAD:  palette=%23FF0000 (only 1 color, minimum is 2)
BAD:  palette=%23FF0000,%23... (more than 10 colors, will be ignored)
GOOD: palette=%23FF0000,%230000FF,%2300FF00 (2-10 colors)

🌐 Web Tools (For Users)#

• Universal Color Converter: https://colors-cc.top/tools/converter
• Random Palette Generator: https://colors-cc.top/tools/random-palette
• CSS Color Names Reference: https://colors-cc.top/tools/color-names
• Fluid Gradient Placeholder: https://colors-cc.top/tools/fluid-placeholder

📚 Full Documentation#

For complete API documentation, reference:

• LLM-optimized docs: https://colors-cc.top/llms.txt
• OpenAPI specification: https://colors-cc.top/openapi.json
• Live site: https://colors-cc.top/

💡 Rate Limits#

None. All endpoints are free and unlimited.