At a certain point in his life, Yves Klein decided that from that moment on he would only use one colour in his paintings: blue. But not any old blue, Yves wanted a unique blue, his own blue, Klein Blue! To paint his works, Yves used wind, rain, fire and even human bodies, inventing Body Art. He also composed a symphony using only one note and he used photography to defy the force of gravity. He always managed to find new ways to impress his audience.