How to use balloon (with blue and red) props to shoot cold and warm contrast tones?

In order to take photos of cold and warm contrast colors, blue and red balloons are originally cold and warm contrast colors, so the problem to be considered when shooting is how to make them look better. Don't shoot the main balloon too small, the light should be bright, and the cold and warm contrast colors should be highlighted with a neutral gray background. You can also add some props to set off, which is neither too monotonous nor too distracting.

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