A moody, elegant birthday party scene in deep blue tones. A single-tier birthday cake sits on a table, decorated with blue and white frosting, and topped with a single number '1' candle, lit. Floating blue balloons surround the cake, with soft falling confetti in the air. A blank banner is hanging at the center top of the scene, ready for custom text. The room is dimly lit with a spotlight highlighting the cake, creating a cinematic and festive atmosphere. Photorealistic, minimal clutter, high-resolution.