A little History from the CS Regulations of Dress

In May 1861, The Confederate States created a rough outline for their uniforms to be worn by all recruits. Finally in June of the same year, with modifications this code was adopted. However by this time, they were already 3 months late, because some states already adopted uniform dress for the recruits from there state. Also keep in mind that for the Confederates the war is basically divided into three eras. Early War, Mid War, and Late War. As the war progressed the Confederates had a harder time manufacturing their uniforms. Lack of product, or labor and the blockade taking its toll on imported goods. So using the cotton that was the one product the south had, they used the cotton warp with wool overlay, thus creating Jean Cloth or Jean Wool. These products did not wear well. So as the soldiers uniforms wore out they had items made at home and shipped to them to wear. Thus another mix to the uniforms. This can be more detailed than I have room to write here, but you can see why there are many variations to confederate uniforms. Also certain depots were contracted to produce a specific amount of uniforms such as the Richmond, Columbus, Atlanta Depots. Their were also private contractors such as Peter Taite.

Below is the May 1861  version of the C.S. Dress Code.

The Coat to be of cadet gray cloth, short tunic, double breasted, two rows of buttons down the breast, two inches apar at the waist, and widening towards the shoulders.

Pantaloons of sky blue cloth, made full in the leg. The different corps of the service to be distinguished by the color of their trimmings - blue for infantry, red for artillery, and yellow for cavalry. The buttons to be of plai gilt, convex form, three quarters of an inch in diameter. In the artillery corps, the buttons to be stamped with the letter A and the infantry and cavalry, the buttons wil bear only the number of the regiment.

For the Generals and officers of his staff the dress will be of dark blue cloth, trimmed with gold, for the medical department, black cloth, and gold and velvet trimming. All badges of distinction were to be marked upon the sleeves and collars. Badges of distinguished rank on the collars only. For a Brigadier-General, three large stars; for a Colonel, two large stars: for a lieutenant-colonel, one large star; for a major, one small star, and a horizontal bar: for a Captain, three small stars, for First Lieutenant, two small stars: for Second Lieutenant, one small star.

For a general and staff officers the buttons will be of bright gilt, convex, rounded at the edge - a raised eagle at the center, surrounded by thirteen stars. Exterior diameter of large size buttons, 1 inch; of small size, 1/2 inch.

No cap has been adopted.

Changes under General Order No 9. dated June 6, 1861

The collar and cuffs of the enlisted man's tunic were now to be faced in the proper branch of service color, and he edges of tunic to be trimmed throughout with the same colored cloth.
A forage cap, modeled after the French Army kepi, was to be the official headgear for both officers and enlisted men, but color was not specified.

The most important change, and one set of regulations that were strictly adhered to, was that of officers uniforms. The base color of the tunic was officially designated as cadet gray, and dark blue was dropped. The patterns for distinguishing rank were also modified to a new system of stars and bars on the collar, and an Austrian style braid to be placed on the sleeve.
Pantaloons for field officers were to be light blue, the General staff retaining their dard blue color.

A new button was to be worn by enlisted men in the infantry and all other branches of service. It was to contain the regimental number in the center. The artillery would keep their letter A for tunic buttons