Definitions

1. noun

A dark brown or reddish-brown color, especially a tint or shade of this color. A type of brown pigment made from the shells of cuttlefish.

“The old photograph had a distinct sepia tone.”

2. verb

To dye or treat something with sepia, especially to give it a brown or reddish-brown color.

“The artist sepia-toned the photograph to give it a vintage look.”