Indigo is a deep blue color that is often associated with the night sky and the ocean. It is one of the colors in the rainbow, appearing between blue and violet. Historically, indigo dye was made from the leaves of the indigo plant, which was highly valued for its rich color. This dye has been used for centuries in textiles, especially in jeans and traditional fabrics. In addition to its visual appeal, indigo has cultural significance in many societies. For example, in India, indigo dyeing is an ancient craft that has been passed down through generations. The color is also linked to spirituality and intuition, often representing deep thought and introspection.