Could add cassimere to the potential...
In brief and to voer generalize a bit .. The curse of not being issued uniforms in reenacting by the government is that each lad obtains his own kit. Unless a unit dictates standards, or a group of lads agree on a standard, each lad can go out and buy what he likes best.
This often leads to no two men in a company looking like they were from the same comapny or possibly regiment. Time, place, and circumstance can often times be on a
"curve." Meaning the closer a regiment or company is to its uniforming and equipping, the more uniform it tends to look as men are receiving batches of the same kit (as far as an arsenal's or depot's shelf inventory could go.
Then dependng upon the severity of the campaign, the length of time between resupplies/reissuance and of what items, and then within the slack or strickness of commanders "making" men replace used or worn items or not, there starts to be variations on the theme as new items are normally, usually, generally often partially introduced on an as needed basis. Perhpas further muddied by the random article of clothing sent from home.
IMHO, Confederate uniforms tend to suffer the most from each man being a world unto himself partly because of the lack of knowledge, recognition, or acceptance of the supply/resupply system- and partly because it seems to be a traditional hobby entrenched line of Confederate "independent thinking" which is reflected less among Federals. But, I believe Federals do much the same, just that dark blue and sky blue is less so obvious in their color intensities and variations than say gray jean, brown jean ranges or better yet British Army cloth and blue jean or green jean or undyed material.
Others' mileage will vary...
In gleichem Schritt und Tritt, Curt Schmidt
Not a real Civil War reenactor, I only portray one on boards and fora.
I do not portray a Civil War soldier, I merely interpret one.