Works of Klein blue

Quick answer：

Klein blue is a deep blue pigment created in 1880 by German chemist Paul Hildebrandt. It has been used in various artistic works, including paintings, sculptures, and designs. Notable artists who have utilized Klein blue include Yayoi Kusama and Gerhard Richter. The pigment is known for its vibrant, almost iridescent quality and is used to create a sense of depth and intensity in artworks.