1, white and gold balloons: white and blue are in sharp contrast, creating a fresh and simple feeling, while gold and blue are in sharp contrast, adding a sense of luxury and celebration atmosphere.
2. Silver and pink balloons: Silver and blue form a contrast between cold and warm, creating a sense of modernity and nobility, while pink and blue form a soft contrast, adding a warm and romantic atmosphere.
3. Yellow and orange balloons: Yellow and blue are in sharp contrast, adding vitality and joy, while orange and blue are in sharp contrast, creating a lively and warm atmosphere.