The visible colors of the rainbow are red, orange, yellow, green, blue, indigo, and violet.

Indigo blue is one of Japan's traditional colours.

I'm not able to remove the indigo dye in my hair!

I can't remove the indigo dye in my hair!

Jeans manufacturers make denim bluer with indigo dye.

I had never seen an indigo bunting until I moved here.

A rainbow consists of red, orange, yellow, green, blue, indigo and violet.