Yves Klein (1928–1962) was a pioneering French artist best known for his striking use of a single color—International Klein Blue—and his radical exploration of immateriality, performance, and conceptual art. A central figure in post-war European art, Klein’s work spanned painting, sculpture, and performance, often blurring the lines between them. He gained acclaim for his monochrome canvases, his “Anthropometries” created with models’ bodies as brushes, and his visionary ideas about art as pure experience. Klein’s legacy continues to influence contemporary art, from minimalism to conceptualism.