前面用介词in，例如：

1. She was dressed in blue.她身着蓝色服装。

2.She was clad in blue velvet.她身着蓝色的天鹅绒服装。

3.The hall was carpeted in blue.大厅铺上了蓝色的地毯。

4.One or two, in blue suits, might have been bank officials. Others were clearly working men.有一两个穿蓝色西装的人可能是银行职员，其他的显然都是普通工人。