Abstract: In nowadays, when people mention fashion color, it is as good as mentioning fashion trends. It get more and more important in the eyes of comsumers and garment makers and distributors. Therefore, it is very important to conduct exact forecast of “fashion color”. Having studied the theory of color science and NCD color image scale as well as the close relationship between them, we try to give a fashion color forecast based on the analysis of the fashion color data aveilable from aspects of abstract and imaginary thinking. We have collected the statistic data on the fashion color “blue” of 2000-2007 spring and summer women’s wear and the appraise value of its fashable extent, the color brightness, purity etc. and built a GM (1,1) model to predict the fashionable extent and shade tendency of blue color in the future.