I did find one interesting related note in the 1912 Kansas Cyclopedia:
William W. Denison, assistant adjutant-general of Kansas some years after the war, was a private soldier in the Eleventh Kansas, and was one of the detail to enforce Gen. Ewing's General Order No. 11 (q. v.). On that occasion he wore the red leggings of the organization, which came to be recognized as "a badge of desperate service in the Union army." Ewing and Blunt, generals, usually had several of the Red Legs on their pay rolls, where they received often as much as $7 per day on account of the hazardous service they were required to render.
http://skyways.lib.ks.us/genweb/archives/1912/r/red_legs.html
So it seems that Bingham's "Order Number 11," which shows Ewing (not Jennison, as some believe) enforcing the order while wearing red leggings, might not be too far off...