A dreamy watercolor painting captures a vast castle floating amid soft, billowing clouds. The structure exudes fairy-tale elegance, with tall, slender spires and delicate arches glistening in the sunlight. The pastel color palette bathes the scene in soothing shades of blush pink, lavender, and sky blue, while hints of golden sunlight dapple the cloud tops. Wispy tendrils of mist wrap around the castle towers, evoking an ethereal and enchanted atmosphere. In the distance, a gentle rainbow arches across the sky, adding a touch of whimsy to this serene, otherworldly landscape.