In this strong background, the red ones will become redder and the green ones will become greener. In view of this, with the sign of "traffic light", the two important opposing concepts of "stop" and "don't stop" are distinguished.
The color matching type with such a large hue contrast angle has strong stimulation to human eyes and dazzling effect, but strong stimulation is more likely to cause visual fatigue and discomfort, which makes people feel anxious as they lose their balance. Therefore, the large-scale collocation of red and green is not pleasing to the eye.
As far as people's requirements for color are concerned, people's vision always needs a physiological balance, that is, when people see any color, they always instinctively demand its relative complementary color. Complementary color is precisely because it has a strong contrast and balanced satisfaction in the visual physiology of color. As long as they are properly matched, they can present the most beautiful effect together. Judging from the overall pattern of color, the real harmonious realm is bright and not too exciting.