International Klein Blue (IKB) is a deep, vibrant blue hue developed by French artist Yves Klein in the 1950s. It is known for its intense saturation and unique ability to evoke emotional responses. Klein created this color to express his artistic vision and to represent the infinite. The color is achieved through a specific formula that uses a synthetic resin to bind the pigment, resulting in a rich, matte finish. IKB has been widely used in various art forms, including painting, sculpture, and performance art, and remains a significant influence in contemporary art.