ethereal smoke infused with holographic colors floats gracefully, creating a dreamlike backdrop

holographic holo iridescent smoke reflective metallic rainbow colors reflections sparkling glow glimmer retro 90s 2000s nostalgic nostalgia spectrum gleam pastel gradient ethereal dreamlike backdrop vapor shimmer colorful vibrant blur abstract fantasy light airy floating delicate swirls magical luminous diffuse translucent creative background mystical soft serene tranquil texture pattern wallpaper art ai generated