蓝灰色

Her slate-blue skirts were kilted boldly about her waist and dovetailed behind her.

她蓝灰色冒失地卷在腰间，塞在背后如同鸠尾。

A condition caused by the ingestion of silver, the Argyria's most dramatic symptom is that the skin becomes blue or bluish-grey colored.

银摄入会带来银中毒并导致皮肤病， 银中毒 明显症状是皮肤变蓝色或蓝灰色。