The walls were painted in a rich indigo.

A deep, rich shade of blue often associated with the spectrum of visible light.
She wore an indigo dress to the party.
The artist used indigo in her painting.
He chose an indigo scarf for the winter.
indigo dye
indigo blue
indigo fabric
navy
blue
azure
The dress is a beautiful shade of indigo.

A deep blue color, often used in dyeing fabrics.
The sky turned indigo at dusk.
She painted the walls indigo for a calming effect.
His favorite color is indigo.
indigo dye
indigo fabric
indigo shades
navy
blue
azure
She wore an indigo scarf.

Describing something that is of a deep blue color.
The walls were painted indigo.
He chose an indigo shirt for the party.
The sky turned indigo at dusk.
indigo dye
indigo fabric
indigo color
navy
azure
blue