Since I can see Mikage having stoyline in Adolescence similar to Black Rose manga chapter, I decided to play around with his uniform too. Though I am really fond of black in general, I think I’ve read somewhere (I don’t remember where, I’m sorry D:) full-black uniform in Adolescence was reserved for Touga because he wasn’t alive anymore. That’s why I put Ruka in full black too and I considered it for Nanami - not because she is dead but because of her connection to her brother.
But you know who would be in full black in Adolescence too? Who is not alive anymore? Mamiya. So Mikage got three versions here. One black, as the most of the uniforms in Adolescence, one deep royal blue, that one is just the variation of his uniform in the series, and my personal favourite - wine red. I like this option the best when I think of Mamiya in black by his side but that may be just my preference.
For the details, I just altered things like buttoning on the side since they use this type in Adolescence a lot. (and I love buttoning on the side, I am biased). Also Mikage got epaulettes and those dangly things because he didn’t have them in the anime and he deserves some.