Unioner ships should be using green hull texture or green highlights, not red. All of their weapons are green... and green is pretty representative of rheinland as a whole.
We've got the red hessians, let the unioners be green.
Its not exactly red actually but a tone of orange. Considering its inclined to have a tangerine-brown outlook once the light effects of FL are involved, I believe it may still have a decent and original effect.