Red. The combination of red and dark gray can inject a touch of bright color, making the overall shape more vivid and eye-catching. Dark gray can balance the bright color of red and keep harmony. The so-called color matching is simply to put the colors in the right place and arrange them optimally. Color has a theoretical influence through people's impressions or associations, and the function of color collocation is to meet the requirements of consumers in all aspects by changing the comfort of space and the surrounding atmosphere. There are two main ways to match colors. One is to control visual stimulation through the contrast of hue, lightness and purity of colors to achieve the effect of color matching; The other is to indirectly change the color through psychological and sensory communication, so as to achieve the effect of color matching.