A very deep shade of gray mixed with blue, gunmetal gray brings to mind the toughness of metal.
The fact that the term “gun” is included in the name creates an aggressiveness that the color might not have been attributed with otherwise. Additionally, with gray known as a serious hue, the darkness of gunmetal gray further compounds that perception. Its richness means that it’s best used to convey a sense of authority or seriousness.
Temper the heaviness by using brighter colors around it, such as bright yellows and oranges. If you’re looking to create a darker aura in your design, using a significant amount of the color can easily accomplish that.