Here's a potential digital illustration based on your description:
Title: 'Moonlit Enchantress'
The illustration features a fantastical woman standing against a backdrop of a large, glowing sea under a shimmering starry night sky. Her yellow hair flows like a river, with intricate strands that seem to come alive in the soft, gentle moonlight. She wears an ornate gown, deep red in color, adorned with intricate flower patterns and sparkling jewels that catch the light. The headpiece is a masterpiece of complexity, featuring delicate petals and gemstones that shimmer and shine. A halo of light and butterflies creates a magical aura around her, as if she's conjuring up the essence of the moon and sea. The moon above casts a soft glow over the scene, illuminating the waves and creating a sense of peace and tranquility.