Tyrion watched as Haldon's face turned green, then red, then purple.

提利昂看着哈尔顿的脸由绿变红再变紫。

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In potash it turns black, but in alum nothing happens until you bring it to the boil, then purple colour comes flooding out.

在碳酸钾中，它变成黑色，而在明矾中一开始却什么反应都没有，直到煮沸后紫色都溢出来了。

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Hallways on either side undulate with a tunnel of pulsing blue, then purple, lights.

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But then you notice the shadowy purple figure seated in the background: a reflection, in the mirror, of Bonnard himself, a sort of omniscient voyeur, watching you watch his wife, whose sewing now looks more like a compulsion than a pastime.

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Then one morning his lips turned purple and Erika rushed him to the emergency room.

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