What is Kujira blue?

Excuse me, could you please clarify what exactly is meant by "Kujira blue"? Is it a specific shade of blue color, a brand, a product, or perhaps a term related to the cryptocurrency or finance industry? I'm quite intrigued by this term and would love to learn more about its context and significance. Could you elaborate on its origins, applications, or any other relevant details? Thank you in advance for your insights.