dark navy blue background subtle cross glow
Prompt
Photorealistic abstract underwater background in deep dark navy blue, with several translucent jellyfish drifting at varied depths like softly glowing forms in an aquarium at night. Use magenta, violet, electric blue, and faint amber bioluminescent edges, with fine suspended particles sparkling in the water. Compose with large partial jellyfish shapes near the edges and smaller blurred forms receding into negative space, leaving a calm central area with a subtle intersecting cross-like glow made from soft light beams, not a symbol. Moody, mysterious, elegant stock background, low-key lighting, gentle diffusion, natural aquatic haze. Shot on a 50mm macro lens, f/2.8, shallow depth of field, clean photoreal detail.
Negative Prompt
people, human faces, logos, watermarks, readable text, trademarks, identifiable locations, religious symbols, harsh HDR, oversaturation, cartoon style, CGI plastic look, noisy artifacts, distorted jellyfish, cluttered composition, bright white background