背景的色调要暗，这样主要人物就会更突出了。
Keep the background colours dark so that the main figure will show more clearly.
背景色调通常采用简单的纯白色/灰色或纯黑色
Plain, solid white/gray or solid dark backgrounds are common
实验研究显示，暖色调（比如红、黄、橙）非常适合作为冷色调（比如蓝、绿、紫）的背景，反之亦然。
red, yellow, orange) are preferred on backgrounds of cool colors (e.g. blue, green, purple) and vice versa.
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