This is the normal Skyrim logo for the Imperial's in Oblivion so if you look at the Skyrim logo, they are the same except for the broken wing. On the Skyrim logo the color appears more not rusted; the rust in the Skyrim logo is for the civil war started the dismay. The color black in the Skyrim logo is for the death of all the Skyrim people from the war. I could not imagine living in this type of place, all the war and death its bad for the society.
The Skyrim logo first started to come into play as the legion symbol in the Elder Scrolls IV oblivion,but then became the Skyrim symbol when the people of Skyrim were in civil war because the Jarl of Skyrim was assassinated but it does not tell you who did it.