I've tried using the Prussia color for the German Empire, and it's too similar to France.
Personally, I use the unified Germany color. Yes, the German Empire was dominated by Prussia, but A) Pan-Germanism is the main reason it was formed, and B) Imperial German soldiers wore green-gray (feldgrau) uniforms.
Personally, I use the unified Germany color. Yes, the German Empire was dominated by Prussia, but A) Pan-Germanism is the main reason it was formed, and B) Imperial German soldiers wore green-gray (feldgrau) uniforms.