The Unioners are not yet considered a territory faction. Claim systems inRP for propaganda as you wish, but this contest, as mentioned in the original post, is for territory that is under immediate, sovereign control. The Unioners indeed have a strong presence in Bering, but that is all.
The Houses were each given a primary/secondary color, with the sitting governments getting medium. Most unlawfuls got a darker shade, but if a House has multiple one is lighter. Thus, the Hessians will not be red. Colors are not up for discussion here.