Blue

Blue is the color of calm and trust. It lowers blood pressure, slows heart rate, and creates a sense of peace. Blue is the world's most popular favorite color, preferred by people across cultures and genders. In Western culture, blue symbolizes trust, loyalty, and wisdom. In Eastern cultures, blue represents immortality and healing. Light blue is associated with openness and freedom, while dark blue conveys authority and confidence.

Blue is the most versatile color in design. It is the most common brand color for technology, finance, and healthcare companies (Facebook, Twitter, LinkedIn, IBM, Ford) because it conveys trust and reliability. Light blue creates a sense of openness and airiness in interior design. Dark navy is authoritative and professional — the most common suit color. Blue pairs well with almost any color: with white for freshness, with orange for high contrast, with gray for sophistication.

Blue was once the most expensive pigment in the world. Ultramarine, made from lapis lazuli mined in Afghanistan, cost more than gold during the Renaissance. The ancient Egyptians were the first to produce a synthetic blue pigment — Egyptian blue — over 4,000 years ago. Blue denim fabric originated in Nîmes, France (de Nîmes → denim) and was popularized by Levi Strauss in the American West. The word 'blue' comes from the Old French 'bleu', originally meaning 'pale' or 'light-colored'.