Between the white gaiters (thanks Abdul), the darker purple and changing the facing to the complementary yellow, I'm liking these. I changed the small clothes to blue as well, in order to tie them more closely to their "Turkish" allies. I'm happy enough with this color scheme to be pretty sure I'll be painting up a unit this way, to see how they look in metal. Worst case scenario: you're looking at a battalion of the Ducal Guard.
Experiment #2: black uniforms.
Another sharp design. I changed out the banner to white, and made the small clothes red because I liked the red, black and white together. The downside is this: the Formulgalan infantry will be in grey, with red small-clothes. The identical small-clothes aside, I'd have one army in (more or less) black, and the other in grey. Not colorful enough, I think.
So, the experiments continue. I'll try Ross' suggestion of yellow uniforms next. I do like the look of the drummer from the "black" experiment very much, and that's close to what they'll look like.
More as I play around.