Is there a difference between Klein blue and sapphire blue? Is there a difference between Klein blue and sapphire blue?

2. Klein Blue originated from the name of the French artist "Yves Klein". Klein's works exhibited in Milan used this sapphire blue and successfully applied for a patent, hence the name Klein Blue. Klein blue is a kind of blue, which is also called sapphire blue because it is similar to pure sapphire. Chromatographically, it is pure blue, with pure tone and pearlescent luster, so it is a kind of pearlescent color system and belongs to cool tone.