Who was considered the father of blue?

The title "father of blue" is often attributed to the artist Yves Klein, a prominent figure in the post-war European avant-garde art movement. Klein is renowned for his distinctive use of a specific shade of blue known as International Klein Blue (IKB), which he developed and patented in the 1950s. His work and philosophy emphasized the emotional and spiritual significance of color, particularly blue, making him a pivotal influence in contemporary art.