Dusty grey that hides in plain sight, like a secret kept behind a mask.
Concealment is a cool grey, close to green.
It can be described as cool, muted, greyish and dusty.
Set in white, because white reads best on it.
A cover-up is an attempt, whether successful or not, to conceal evidence of wrongdoing, error, incompetence, or other embarrassing or criminalizing information. Research has distinguished personal cover-ups from relational cover-ups
Read on WikipediaConcealed carry, or carrying a concealed weapon (CCW), is the practice of carrying a weapon, either in proximity to or on one's person in public places in a manner that hides or conceals the weapon's presence from surrounding observers. In the United States, the opposite of concealed carry is called open carry.
Read on WikipediaNoun