bluecoat

1. I longed to know if he'd be married in his bluecoat.
   我在幻想他在婚礼上穿着他的蓝色外套。
2. Gudrun came up quickly, unseen. She was dressed in blue, with woollen yellow stocking, like the Bluecoat boys.
   瞬间，古娟神不知鬼不觉地出现了。她穿着蓝色衣服，黄色羊毛长统袜，颇似慈善学校的学生。

noun

1. a person dressed all in blue (as a soldier or sailor)