One of the colors of the rainbow, indigo — a dark purplish blue — gets it name from the indigo plant used to create the indigo dye."
this site. It goes on to say:
"Indigo appears between blue and violet in a rainbow. Purple grapes and blueberries are indigo. The deep blue of dark denim blue jeans is indigo.
Indigo is a deep, purply blue with some indigos having more blue or more violet."
I had trouble finding real-life examples of indigo, so I therefore turned to some of my artwork for help!
Crow Creates the Night
Please go to Julie B Booth's and Jennifer Coyne Qudeen's blogs for links to see more indigo.