The prince stands proudly in front of the beast, his hand resting on the beast's head in a gesture of compassion. The beast kneels with a large key held in its hands, symbolizing the beginning of a new journey. Behind them looms the threshold of the castle, its door flung open to the sun-kissed landscape. Color the prince in regal golden shades, and the beast in a mix of warm greys and browns. The key should be painted a majestic silver, and the open door a deep, inviting yellow. Finally, frame the beautiful scene with an ethereal sky blue, highlighting the beauty of the moment.