Sgt Scott,
"Tinting an image was popular early on in the history of antique images, especially in the early 1860s. The most common type of tinting was a pinking of the cheeks to give the face a little healthy color. You will see pink cheeks on ambrotypes, cdvs, and tintypes.
Yet some photographers expanded their range and use of color beyond a bit of pink. Some photographers highlighted buttons, jewelry, or military medals with a bold gold. It was especially popular to gild a buckle or some buttons on a soldier's uniform, or decoration on a kepi, in the many Civil War ambros or tintypes. Others tinted a lady's dress in a bold blue or green or red, or perhaps chose one aspect of her outfit to decorate with a hue. A feather on a hat might be picked out or a scarf or bow. A child's dress might receive a wash of color with perhaps a blond glow to the hair.
Some photographers used color quite subtly. But others headed in the direction of recreating a painting. Bold colors in various tints were applied all over the image- yellow hair, blue eyes, green background, even a white shirt painted on to a naked baby!
Some photographers combined colorful tinting with gilding
By the late 1860s, tinting became less common and gradually disappeared from images into the 1870s, although some photographers clung to the process for a while".
Two Flints