The gray image is soft and elegant, belonging to the middle character, which can be accepted by both men and women. Therefore, gray is also the main color that will always be popular. In many high-tech products, especially those related to metal materials, almost all use gray to convey the image of advanced technology. When using gray, most of them use different levels of changes or other colors, so that they will not be dull, but will have a dull and rigid feeling.
Black and white are the last abstraction of color, representing the cathode and anode of the color world. Taiji patterns are black and white circles to show the eternal movement of the universe. Black means emptiness, like the destruction of the sun, like eternal silence, with no future and no hope. The white silence has infinite possibilities. Black and white are extremely opposite colors, and always show their strength by each other's existence. They seem to be the masters of the whole color world.
Gray is probably the most passive color in the color system. It is a completely neutral color, relying on the adjacent colors to get life. Gray means the disappearance of all color contrast and is the most stable rest point of vision. However, the human eye can't stare at the gray for a long time and indefinitely, because endless rest means death.
Black, white and gray occupy a very important position in color matching. They are active in various color combinations, changing each other's lightness, brightness and hue to the maximum extent, and producing multi-level and multi-variety beautiful colors. Therefore, they are achromatic colors that cannot be ignored.