If anyone knows of a record that lists a soldier as having 'black' or 'brown' complexion, please let us know.
State archives includes many wartime and post-war company rolls. Post-war rolls were often made by veterans listing the names of comrades. Given how segregated post-war society became, they certainly would have noted slaves or FMoC on their rolls.
Col. Oates, who annotated the roll made on Dec. 31, 1864, of all men who served in his regiment, would certainly have made mention of any soldier who was not white. As a advocate of Black Confederate enlistment (which we are supposing to have taken place regardless), he would have been quick to note a black man as a good soldier or not. I've been through the rolls of the 15th Alabama Regt. which he noted more than once, and never seen any reference to race.
For one I cannot convince myself that black men were being enrolled by *someone* and serving in the ranks without being noticed by William C. Oates, Patrick Cleburne, Dabney H. Maury and many other Confederate leaders. I understand you believe this must have been happening. Can you explain how would field officers have been ignorant of the facts?