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Quick answer：Klein blue, also known as 'International Klein Blue', is a deep, vivid blue pigment created by French artist Yves Klein in 1960. It is characterized by its rich, dark color and is often associated with Klein's monochrome paintings. The pigment is created by suspending aluminum particles in a clear resin, resulting in a unique and consistent shade of blue. It is used in various artistic, industrial, and commercial applications.
