if helps Thy way I see it from the lore. Colovians are a hardy, strong willed, militaristic people. for real life inspiration. Imagine the armor thy would have would be Greco-romano-byzentine with a mixture of Slavic and Germanic. I say Slavic and Germanic because the colovians have meny Eastern Europe styled names for citys like skinGRAD and KVatch (kv sounding similar to the name Kiev and grad being a name at the end of many Slavic and Easten Europe city names like Leningrad,Stalingrad and what not)also the story about Rislav Larich the colovian king of skingrad. who wore "kings klibanion mail" made from boiled and waxed leather riveted shut with inch-long spikes. klibanion is a type of Lamellar or Scale armor made from metal. The province cyrodill team made Greco-Roman styled muscle Curiass for the colovians. https://en.uesp.net/wiki/Oblivion:Rislav_The_Righteous Colo-nordic are a ethnic group of colovians, thy have Nordic ancestry (thus the name colo-NORDIC) and make up much of the colovian nobility and generals of the legion ( i imagine general Tullius from skyrim is a Colo-nordic) I imagine maybe their armor would also have a Nordic influence. eras like Bruma come to mind. These a just a few armors for colovia their armor should look utilitarian, Functional. With very little unnecessary Detail.