Blue and Black Background CSS - Professional Dark Blue Designs

Live Blue and Black Background Examples

Professional Gradient

background: linear-gradient(135deg, #0066ff 0%, #000000 100%);

Electric Blue Glow

background: radial-gradient(circle, #00ccff 0%, #000000 70%);

Tech Lines

background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 10px,
    #0066ff 10px,
    #0066ff 20px
), #000000;

Dual Orbs

background: #000000;
background-image: 
    radial-gradient(circle at 10% 20%, rgba(0, 102, 255, 0.8) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(0, 204, 255, 0.6) 0%, transparent 40%);

Animated Checkers

background: linear-gradient(45deg, #000000 25%, #0066ff 25%, 
    #0066ff 50%, #000000 50%, #000000 75%, #0066ff 75%);
background-size: 40px 40px;
animation: slide 2s linear infinite;

Conic Sweep

background: conic-gradient(from 180deg at 50% 50%, 
    #0066ff 0deg, #000000 90deg, #00ccff 180deg, 
    #000000 270deg, #0066ff 360deg);

Diamond Pattern

background: linear-gradient(135deg, transparent 25%, 
    rgba(0, 102, 255, 0.2) 25%, rgba(0, 102, 255, 0.2) 50%, 
    transparent 50%, transparent 75%, rgba(0, 102, 255, 0.2) 75%), #000000;
background-size: 50px 50px;

Aurora Borealis

background: 
    radial-gradient(ellipse 600px 300px at 50% 0%, rgba(0, 102, 255, 0.5) 0%, transparent 100%),
    radial-gradient(ellipse 600px 300px at 50% 100%, rgba(0, 204, 255, 0.3) 0%, transparent 100%),
    #000000;

Ocean Wave Animation

Perfect for marine and water-themed designs

Interactive Particle Field

Move your mouse to see the particles react

Practical Use Cases

💼 Corporate Sites

Blue conveys trust and professionalism, making it perfect for business websites, consulting firms, and B2B platforms.

💻 Tech Companies

The combination suggests innovation and reliability, ideal for software companies, SaaS platforms, and tech startups.

🏦 Financial Services

Blue represents stability and security, perfect for banks, investment firms, and financial technology applications.

🏥 Healthcare

Calming blue tones work well for medical websites, health apps, and wellness platforms.

Design Tips for Blue and Black Backgrounds

Color Psychology: Blue conveys trust, stability, and professionalism
Shade Selection: Use various blues (#0066ff, #0099ff, #00ccff) for depth
Contrast Ratios: Ensure WCAG compliance with proper text contrast
Accent Colors: White, silver, or light blue work well as accents
Gradient Direction: Diagonal gradients (135deg) create dynamic layouts
Animation Performance: Use transform and opacity for smooth animations

Advanced Blue and Black Techniques

Tech Grid Background

background: 
    linear-gradient(90deg, rgba(0, 102, 255, 0.1) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 102, 255, 0.1) 1px, transparent 1px);
background-size: 30px 30px;

Glassmorphism Effect

.glass-blue {
    background: linear-gradient(135deg, 
        rgba(0, 102, 255, 0.1) 0%, 
        rgba(0, 0, 0, 0.8) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 102, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 102, 255, 0.37);
}

Neon Blue Glow

.neon-blue {
    background: #000000;
    position: relative;
}

.neon-blue::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #0066ff, #00ccff, #0066ff);
    border-radius: inherit;
    filter: blur(20px);
    opacity: 0.8;
    z-index: -1;
    animation: neon-pulse 3s ease-in-out infinite;
}

@keyframes neon-pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

Why Blue and Black Backgrounds?