How do you describe the colour Indigo?

Indigo is a deep, dark blue color that is often described as being close to the color of a dark denim jeans. It is a secondary color, which means it is created by mixing two primary colors. In the case of indigo, it is created by mixing blue and red. The color indigo is often associated with royalty, wealth, and wisdom. It is also the color of the chakra that is located at the third eye, which is said to be the center of intuition and spiritual insight.