The Morning Coat or Riding Coat. This is the informal coat of a gentleman’s clothing. Its distinguishing characteristics are the front edges which slope to the round-edged tails in back. Generally, the tails of the riding coat were a little shorter than the walking coat but the lines on that distinction seem a bit blurry. A blue morning coat with buff or tan breeches was considered the epitome of fashionable casual wear. Other popular colors included olive, bottle-green, and even plum. Green and brown also show up frequently but those seem to be primarily for country living. Morning coats or riding coats were usually double-breasted, and could be customized with a pocket(s) in the back by the tails. Buttons in silver or brass seemed to be popular, based on the fashion plates I have studied.
The dress coat. Similar to day’s “tux and tails,” the dress coat was short through the trunk
and cut straight across to allow the waistcoat to peek out below. It had long, square tails in back. This was fashionable and appropriate for formal occasions. Black was the most formal but I often see engravings of gray and blue as well, as shown in the picture to the right. Formal tailcoats were made of very fine wool and given a dress finish called “superfine.” Often the dress coats themselves were called simply “superfine.” Buttons were usually covered with matching cloth.
During the Regency, Georgian-style frockcoats were required court attire. They were very ornate, with brocade or heavy-embroidery such as what you see in pictures of George Washington and other Georgian-Era gentlemen. Court costume included trimming such as fur, ribbons, and gold or silver-threaded lace. Court frockcoats were not cut in at the waist but had a more square shape, and they had long, elegant tails.
A Regency gentleman's appropriate coat is very much dictated by his taste, wealth, and the type event he is going to attend.