a gray color that has a slight silvery shine or metallic luster

dark gray; oxford gray

Public officials' use of public funds or property for private consumption by exploiting legal loopholes; examples include excessive official banquets or using government cars for personal trips

a dark grey color like the surface of oxidized iron

Income from sources other than one's official salary that is not strictly illegal but is often undeclared or unofficial, such as bonuses, tips, or side jobs; sits in a gray area between [[白色收入|白色收入|bai2 se4 shou1 ru4]] and [[黑色收入|黑色收入|hei1 se4 shou1 ru4]].

A situation or topic that is not clearly defined or where there are no clear rules; an intermediate area between two opposites, such as between what is right and wrong or legal and illegal.