Background Blend Mode in CSS

<div class="header">
  <h1>Background Blend Modes</h1>
  <p class="subtitle">Explore 15 Different CSS Blend Modes</p>
</div>

<div class="grid">
  <div class="blend-card multiply">
    <div class="blend-label">Multiply</div>
  </div>

  <div class="blend-card screen">
    <div class="blend-label">Screen</div>
  </div>

  <div class="blend-card overlay">
    <div class="blend-label">Overlay</div>
  </div>

  <div class="blend-card darken">
    <div class="blend-label">Darken</div>
  </div>

  <div class="blend-card lighten">
    <div class="blend-label">Lighten</div>
  </div>

  <div class="blend-card color-dodge">
    <div class="blend-label">Color Dodge</div>
  </div>

  <div class="blend-card color-burn">
    <div class="blend-label">Color Burn</div>
  </div>

  <div class="blend-card hard-light">
    <div class="blend-label">Hard Light</div>
  </div>

  <div class="blend-card soft-light">
    <div class="blend-label">Soft Light</div>
  </div>

  <div class="blend-card difference">
    <div class="blend-label">Difference</div>
  </div>

  <div class="blend-card exclusion">
    <div class="blend-label">Exclusion</div>
  </div>

  <div class="blend-card hue">
    <div class="blend-label">Hue</div>
  </div>

  <div class="blend-card saturation">
    <div class="blend-label">Saturation</div>
  </div>

  <div class="blend-card color">
    <div class="blend-label">Color</div>
  </div>

  <div class="blend-card luminosity">
    <div class="blend-label">Luminosity</div>
  </div>
</div>

<div class="info-section">
  <h2>About Blend Modes</h2>
  <p>CSS background-blend-mode property blends multiple background layers together. Each card combines three layers: a base color (#000f89), radial gradients, and a linear gradient pattern.</p>
  <p><strong>How it works:</strong> The blend mode determines how the layers combine mathematically to produce the final colors you see. Different modes create dramatically different visual effects.</p>

  <div class="blend-list">
    <div class="blend-item">Multiply</div>
    <div class="blend-item">Screen</div>
    <div class="blend-item">Overlay</div>
    <div class="blend-item">Darken</div>
    <div class="blend-item">Lighten</div>
    <div class="blend-item">Color Dodge</div>
    <div class="blend-item">Color Burn</div>
    <div class="blend-item">Hard Light</div>
    <div class="blend-item">Soft Light</div>
    <div class="blend-item">Difference</div>
    <div class="blend-item">Exclusion</div>
    <div class="blend-item">Hue</div>
    <div class="blend-item">Saturation</div>
    <div class="blend-item">Color</div>
    <div class="blend-item">Luminosity</div>
  </div>
</div>

    * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: #0a0a0a;
            color: #fff;
            min-height: 100vh;
            padding: clamp(20px, 5vw, 60px);
        }

        .header {
            text-align: center;
            margin-bottom: clamp(30px, 5vw, 50px);
        }

        h1 {
            font-size: clamp(32px, 6vw, 56px);
            font-weight: 700;
            color: #000f89;
            text-shadow: 0 0 30px rgba(0, 15, 137, 0.6);
            margin-bottom: clamp(8px, 2vw, 12px);
            animation: glow 3s ease-in-out infinite alternate;
        }

        @keyframes glow {
            from { text-shadow: 0 0 20px rgba(0, 15, 137, 0.4); }
            to { text-shadow: 0 0 40px rgba(0, 15, 137, 0.8), 0 0 60px rgba(0, 15, 137, 0.4); }
        }

        .subtitle {
            font-size: clamp(14px, 2.5vw, 18px);
            color: #888;
        }

        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: clamp(16px, 3vw, 24px);
            max-width: 1400px;
            margin: 0 auto;
        }

        .blend-card {
            position: relative;
            height: clamp(250px, 30vw, 350px);
            border-radius: 16px;
            overflow: hidden;
            cursor: pointer;
            transition: transform 0.3s;
            box-shadow: 0 10px 30px rgba(0, 15, 137, 0.2);
        }

        .blend-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(0, 15, 137, 0.4);
        }

        /* Multiply */
        .multiply {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: multiply;
        }

        /* Screen */
        .screen {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: screen;
        }

        /* Overlay */
        .overlay {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: overlay;
        }

        /* Darken */
        .darken {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: darken;
        }

        /* Lighten */
        .lighten {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: lighten;
        }

        /* Color Dodge */
        .color-dodge {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.5) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.4) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: color-dodge;
        }

        /* Color Burn */
        .color-burn {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: color-burn;
        }

        /* Hard Light */
        .hard-light {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: hard-light;
        }

        /* Soft Light */
        .soft-light {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: soft-light;
        }

        /* Difference */
        .difference {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: difference;
        }

        /* Exclusion */
        .exclusion {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: exclusion;
        }

        /* Hue */
        .hue {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, #ff6b6b 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, #4ecdc4 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: hue;
        }

        /* Saturation */
        .saturation {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, #ff6b6b 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, #4ecdc4 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: saturation;
        }

        /* Color */
        .color {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, #ff6b6b 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, #4ecdc4 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: color;
        }

        /* Luminosity */
        .luminosity {
            background-color: #000f89;
            background-image: 
                radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.6) 0%, transparent 50%),
                linear-gradient(135deg, #000f89 25%, #1a2fb5 50%, #000f89 75%);
            background-blend-mode: luminosity;
        }

        .blend-label {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: clamp(12px, 2vw, 16px);
            background: rgba(0, 15, 137, 0.9);
            backdrop-filter: blur(10px);
            text-align: center;
            font-weight: 600;
            font-size: clamp(13px, 2vw, 15px);
            text-transform: uppercase;
            letter-spacing: 1px;
            border-top: 2px solid rgba(255, 255, 255, 0.2);
        }

        .info-section {
            max-width: 800px;
            margin: clamp(40px, 6vw, 60px) auto 0;
            padding: clamp(24px, 4vw, 32px);
            background: rgba(0, 15, 137, 0.1);
            border: 2px solid #000f89;
            border-radius: 16px;
        }

        .info-section h2 {
            color: #000f89;
            font-size: clamp(22px, 4vw, 28px);
            margin-bottom: clamp(12px, 2vw, 16px);
        }

        .info-section p {
            color: #ccc;
            font-size: clamp(14px, 2vw, 16px);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .blend-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            gap: clamp(8px, 1.5vw, 12px);
            margin-top: clamp(16px, 3vw, 20px);
        }

        .blend-item {
            padding: clamp(8px, 1.5vw, 12px);
            background: rgba(0, 15, 137, 0.2);
            border-radius: 8px;
            text-align: center;
            font-size: clamp(12px, 1.8vw, 14px);
            color: #000f89;
            font-weight: 500;
        }

        @media (max-width: 640px) {
            .grid {
                grid-template-columns: 1fr;
            }
            
            .blend-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }