Indigo, found between blue and violet in the color wheel, is a natural pigment that comes from plants and is traditionally considered one of the 7 major spectral colors.
It is the color of devotion, wisdom, justice, and higher knowledge. Tied to intuition and what is not seen, it is also considered spiritual.
To nail great color combos for indigo, look to nature and how she wisely picks her palettes: indigo works wonderfully with reds, greens, and yellows. The deep hue pairs particularly well with oranges and yellows. These combinations work best when orange and yellow are used as accent colors.