Images with gray as the predominant color

Quick answer：

This refers to a visual aesthetic where gray is the dominant color scheme in an image. Gray color schemes are often used in photography, art, and design for a variety of reasons including conveying a sense of neutrality, simplicity, and elegance. They can also be used to evoke a mood of melancholy or calmness. In design, gray tones are frequently used to create a cohesive and sophisticated look.