stx/examples/colors.stx at main · stacksjs/stx · GitHub

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<script server>
// Generate a random set of harmonious colors
function generatePalette() {
  const palette = [];
  // Base hue - random value between 0 and 360
  const baseHue = Math.floor(Math.random() * 360);

  // Create 8 colors based on the base hue
  for (let i = 0; i < 8; i++) {
    // Calculate a hue that's offset from the base
    const hue = (baseHue + i * 45) % 360;
    // Vary saturation and lightness
    const saturation = 65 + Math.floor(Math.random() * 35);
    const lightness = 45 + Math.floor(Math.random() * 30);

    // Create the color object
    const color = {
      id: i,
      name: `Color ${i + 1}`,
      hsl: `hsl(${hue}, ${saturation}%, ${lightness}%)`,
      hex: hslToHex(hue, saturation, lightness),
      rgb: hslToRgb(hue, saturation, lightness),
      contrastWithWhite: getContrastRatio(hslToRgb(hue, saturation, lightness), [255, 255, 255])
    };

    palette.push(color);
  }

  return palette;
}

// Convert HSL to Hex color
function hslToHex(h, s, l) {
  const rgb = hslToRgb(h, s, l);
  return `#${rgb[0].toString(16).padStart(2, '0')}${rgb[1].toString(16).padStart(2, '0')}${rgb[2].toString(16).padStart(2, '0')}`;
}

// Convert HSL to RGB
function hslToRgb(h, s, l) {
  s /= 100;
  l /= 100;
  const k = n => (n + h / 30) % 12;
  const a = s * Math.min(l, 1 - l);
  const f = n => l - a * Math.max(-1, Math.min(k(n) - 3, Math.min(9 - k(n), 1)));
  return [
    Math.round(255 * f(0)),
    Math.round(255 * f(8)),
    Math.round(255 * f(4))
  ];
}

// Calculate contrast ratio between two RGB colors
function getContrastRatio(rgb1, rgb2) {
  const getLuminance = rgb => {
    const [r, g, b] = rgb.map(c => {
      c /= 255;
      return c <= 0.03928 ? c / 12.92 : Math.pow((c + 0.055) / 1.055, 2.4);
    });
    return 0.2126 * r + 0.7152 * g + 0.0722 * b;
  };

  const l1 = getLuminance(rgb1);
  const l2 = getLuminance(rgb2);

  const ratio = (Math.max(l1, l2) + 0.05) / (Math.min(l1, l2) + 0.05);
  return Math.round(ratio * 10) / 10;
}

const paletteTitle = 'stx Color Palette Generator'
const colorPalette = generatePalette()
const timestamp = new Date().toLocaleTimeString()
</script>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>stx Dynamic Colors</title>
  <style>
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
      max-width: 800px;
      margin: 0 auto;
      padding: 2rem;
      line-height: 1.6;
    }
    header {
      text-align: center;
      margin-bottom: 2rem;
    }
    h1 {
      font-size: 2.5rem;
      margin-bottom: 0.5rem;
    }
    .palette {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 1.5rem;
    }
    .color-card {
      border-radius: 0.5rem;
      overflow: hidden;
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .color-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }
    .color-preview {
      height: 150px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
      font-weight: bold;
    }
    .color-info {
      padding: 1rem;
      background-color: white;
    }
    .color-name {
      font-weight: bold;
      margin-bottom: 0.5rem;
    }
    .color-hex {
      font-family: monospace;
      color: #666;
    }
    .color-rgb {
      font-family: monospace;
      font-size: 0.9rem;
      color: #888;
      margin-top: 0.5rem;
    }
    .contrast {
      display: flex;
      margin-top: 0.5rem;
      font-size: 0.9rem;
    }
    .contrast-box {
      width: 20px;
      height: 20px;
      border-radius: 4px;
      margin-right: 0.5rem;
    }
    .dark-text {
      color: black;
      text-shadow: none;
    }
    .footer {
      margin-top: 3rem;
      text-align: center;
      color: #666;
    }
  </style>
</head>
<body>

<header>
  <h1>{{ paletteTitle }}</h1>
  <p>Refresh the page or edit this file to generate new colors. Last updated: {{ timestamp }}</p>
</header>

<div class="palette">
  @foreach (colorPalette as color)
    <div class="color-card">
      <div class="color-preview" style="background-color: {{ color.hex }}">
        <span class="{{ color.contrastWithWhite < 4.5 ? 'dark-text' : '' }}">{{ color.name }}</span>
      </div>
      <div class="color-info">
        <div class="color-name">{{ color.name }}</div>
        <div class="color-hex">{{ color.hex }}</div>
        <div class="color-rgb">{{ color.rgb.join(', ') }}</div>
        <div class="contrast">
          <div class="contrast-box" style="background-color: white; border: 1px solid #ddd;"></div>
          Contrast: {{ color.contrastWithWhite }}:1
        </div>
      </div>
    </div>
  @endforeach
</div>

<div class="footer">
  <p>Created with stx Templating Engine</p>
  <p>Try modifying this file at <code>examples/colors.stx</code></p>
</div>

</body>
</html>