What determines the hue of infrared cloud pictures on satellite cloud pictures?

According to official website, the Meteorological Bureau, on satellite cloud images, the hue of infrared cloud images depends on the temperature of objects. The higher the temperature of the object, the greater the radiation and the darker the color tone. Therefore, the infrared cloud image can be regarded as a temperature distribution map. This relationship between hue and temperature can help meteorologists and researchers understand the height and thickness of clouds and the movement of clouds. At the same time, infrared cloud images can provide more information than visible light cloud images. For example, at night or in bad weather, infrared cloud images can continuously provide useful meteorological information without being affected by lighting conditions.