The color combination of the 100 yuan banknote, also known as the 'Yuan' note in China, typically includes a blend of red, green, and blue hues. These colors are chosen for their distinctiveness and to reflect the high value of the note. The red is prominent and is often used for the main design elements, symbolizing prosperity and happiness. Green accents are used for the background and fine details, and blue is used for smaller elements to add visual depth. The design aims to create a harmonious and appealing look while ensuring security features are easily recognizable.