International Klein Blue is a special kind of blue color that was created by an artist named Yves Klein in the 1950s. It's a really bright and pretty blue that is different from other blues you might see.
Yves Klein was very passionate about this color, and he wanted it to be special and stand out. He made it by mixing together different materials until he found the perfect shade of blue that he was looking for.
He used this blue color in a lot of his paintings and artworks, and it became very famous because it was so unique and beautiful. People loved looking at it and Yves Klein became famous too!
Nowadays, artists still use International Klein Blue in their artworks because it's an iconic color that people love. And when you see this special blue color, you might think of Yves Klein and all the amazing art he created.