navy blue

He chose a navy blue suit and a white shirt for his sister's formal wedding ceremony.

(Chinese) 他为姐姐的正式婚礼选了一套藏青色西装和一件白衬衫。

The school uniform consists of a navy blue sweater and grey trousers for all students.

(Chinese) 所有学生的校服都由一件藏青色毛衣和灰色长裤组成。