Orange is a bright and lively color and the warmest color in the warm color system. It reminds people of golden autumn and rich fruits. It is a rich, happy and happy color. When orange is slightly mixed with black or white, it will become a steady, subtle and bright warm color, but when mixed with more black, it will become a burnt color; Adding more white to orange will bring a sweet and greasy feeling. The visibility of orange is very high. Among the industrial safety colors, orange is a warning color, such as motorcycles, mountaineering clothes, backpacks, life jackets and so on. Orange can generally be used as a festive color, but also as a rich color, such as many decorations in the palace. Orange can be used as the decoration color of the restaurant. It is said that using oranges in restaurants can increase appetite. Orange is matched with light green and light blue to form the loudest and happiest color. Orange and light yellow have a comfortable sense of transition. Generally, orange can't be matched with purple or dark blue, which will give people a feeling of uncleanness and obscurity. Because orange is very bright and dazzling, it sometimes makes people have a negative and vulgar image, which is especially easy to happen in the use of clothing. Therefore, when using orange, we should pay attention to the choice of matching colors and expressions in order to set off the bright, lively and delicious characteristics of orange.