indigo

Indigo (#4B0082) is a deep, rich blue-violet CSS named color corresponding to one of the seven colors of the rainbow, positioned between blue and violet in the visible spectrum. Sir Isaac Newton identified indigo as a distinct spectral hue, though its status as a separate rainbow color has been debated by scientists. Historically, indigo dye from the indigofera plant was among the most prized and costly pigments in the world.

Dark purples like plum and amethyst convey mystery, power, and regal authority. They suggest hidden depths, secret knowledge, and ambitious vision. In Western cultures, deep purple often appears in religious vestments and academic regalia, reinforcing its association with wisdom and ceremony.

Dark purple excels in entertainment branding, gaming interfaces, and luxury e-commerce. It creates dramatic hero sections and immersive backgrounds that feel rich and engaging. Pair it with electric violet or bright pink accents for energy, or with gold and cream for timeless elegance.