What color is your favorite sky color? My favorite sky color is sky bule . Actually , there is a strict definition in Sky blue. According to the technical books , the blue color observed in a state with less water vapor and dust less than 80 km from New York at 10am-3pm in summer sunny. Since the summer in Japan is quite humid, the sky looks whitish and it's easy to see, so l can expect autumn. In autumn I would like to see the sky blue as much as possible .