Sepia (noun)

1. A brownish-grey color.
2. A brownish-grey tint in black-and-white photography.
3. A monochrome picture made using sepia.

Origin:

From latin, from the name of the cuttlefish genus sepia.

Examples:

1. The old photo has a beautiful sepia tone to it.
2. I prefer my photos in black and white, but a sepia tint can give them a unique look.
3. The artist used sepia ink to create a beautiful old-world map effect on the paper.
4. The sepia colored painting of the horse looked timeless and classic.
5. She loved the sepia photo of her grandparents, it was the only one she had of them.