From the update:
If you look at any of the French or Italian Recognition Cards, you’ll note the background sky for each ship has the same tone/coloring. This is particularly apparent when you take a look at the poster. Almost as if they’re all flying in the same sky “shot”.
This, of course, was done on purpose. Both to instantly provide a visual awareness of which ship is with which faction (even beyond the ships themselves), and ultimately to simply provide a cool look that sets the vibe for a given faction.
The Germans were no different…needed a new coloring/tone for the background, which J. embraced very quickly.