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Quick answer：Klein blue is a deep, rich blue pigment created in 1880. It is known for its intense and vibrant hue, often used in fine arts and design. The pigment was named after the German chemist Paul H. Klein who synthesized it.
Quick answer：Klein blue is a deep, rich blue pigment created in 1880. It is known for its intense and vibrant hue, often used in fine arts and design. The pigment was named after the German chemist Paul H. Klein who synthesized it.