Dusty, worn grey, like a battlefield after the bugle's last call.
Retreat is a cool grey.
It can be described as cool, muted, greyish and dusty.
Set in black, because black reads best on it.
A bugle call is a short tune, originating as a military signal announcing scheduled and certain non-scheduled events on a military installation, battlefield, or ship. Historically, bugles, drums, and other loud musical instruments were used for clear communication in the noise and confusion of a battlefield. Naval bugle calls were also used to command the crew of many warships.
Read on WikipediaA tactical withdrawal or retreating defensive action is a type of military operation, generally meaning that retreating forces draw back while maintaining contact with the enemy. A withdrawal may be undertaken as part of a general retreat, to consolidate forces, to occupy ground that is more easily defended, force the enemy to overextend to secure a decisive victory, or to lead the enemy into an ambush. It is considered a relatively risky operation, requiring discipline to keep from turning into a disorganized rout or at the very least doing severe damage to the military's morale.
Read on WikipediaIn the survivalist subculture or movement, a retreat is a place of refuge. Sometimes their retreats are called a bug-out location (BOL), a bunker, or a bolt hole. Survivalist retreats are intended to be self-sufficient and easily defended. Generally, they are located in sparsely populated outback rural areas.
Read on WikipediaProper noun