Deep Blue

The modern concept of deep blue can be traced back to the color revolution of 18th-century Europe. In 1704, a German pigment manufacturer accidentally synthesized Prussian blue in Berlin, the first modern artificial deep blue pigment. Compared to expensive lapis lazuli, Prussian blue was cheap and highly tintable, quickly spreading through European studios and dye-works, laying the foundation for deep blue's entry into daily life.

In the early 19th century, the British Royal Navy selected deep blue for its officers' uniforms. This decision imbued deep blue with strong connotations of discipline and authority. Subsequently, police, railway, and aviation professions followed suit, making the deep blue uniform a visual symbol of order and public service in modern society, an influence that continues to this day.

In the mid-to-late 19th century, with the industrial mass production of indigo dye, deep blue fabric entered the consumer market. In 1873, Levi Strauss made the first pair of riveted work pants from indigo denim, forever binding deep blue to labor, resilience, and the spirit of the American West, becoming a global everyday color that transcends class.

In the 20th century, deep blue was widely adopted by corporations and financial institutions as a brand color. Represented by IBM, 'Deep Blue' became synonymous with technology and trustworthiness. Color psychology research confirmed that deep blue inspires trust and a professional impression, making it ubiquitous in banking, insurance, law, and government agencies.

Entering the digital age, deep blue became a core color for screen interfaces. From early operating system default themes to today's widespread dark modes, deep blue, with its low visual fatigue and excellent hierarchical expression, has become a bridge color connecting the authority of the physical world with the immersive experience of the digital world.