In Act I of the show, an orange colored hall is lifted from a blue box and moved slowly.

在第一幕中，一个橙色的大厅从一个蓝色的盒子里被举起来，慢慢地移动。

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The hall was carpeted in blue.

大厅铺上了蓝色的地毯。

《牛津词典》

If you will be presenting in a dark room (such as a large hall), then a dark background (dark blue, grey, etc.) with white or light text will work fine.

如果您是在一间黑暗的屋子(如大厅)里进行演示，那么暗色背景(深蓝、灰色等)加白色或浅色文本的效果就很好。

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