cosmic noir: mystical black & blue background for an enchanting visual experience

captivating black blue background harmonious blend mysterious backdrop vibrant design dark color combination enchanting visuals striking contrast modern aesthetic sophisticated theme sleek graphics elegant composition contemporary elements noir-inspired artwork mystical patterns dramatic shading cosmic-themed timeless palette illustrations dynamic web futuristic high-quality versatile textures creative inspirations digital art expressive intriguing branding marketing materials unique abstract compositions contrasts prints inspiring schemes gradients tones posters bold social media product packaging professional website visual effects expert