In order to acquire some identified shadow features which can be easily obtained,several common color models used in image color space were summarized,and then the intensity,the hue,the saturation,the relation between G magnitude and B magnitude of shadows in color remote sensed images were studied.Based on a series of experiments and theoretical analysis,several conclusions were obtained:1) higher-level values in hue channel can indicate the locations of shadow in a certain degree; 2) low intensity is an important property of shadows in remote sensed image; 3) the saturation distributions of most shadowed areas are similar in general; 4) to the different shadow areas in a same image,the G components are always higher than the B components or always lower than the B components in most cases,and also this relation keeps consistency in the statistical sense.Experiments indicate that these shadow features are useful for automatic shadow detection in color images and can be used as the basic features for model building.