“蔚蓝色”的英语可以翻译为：sky blue，sky-blue ...

蔚蓝色的天空中,时而飘过几朵白云.Sometimes several clusters of white clouds drift across the blue sky.他那对蔚蓝色的眼睛十分和蔼可亲.His blue eyes are the good sort.蔚蓝色的天空晴朗无云.The sky was clear and blue....