Merritt

Prussian blue is a dark blue pigment produced by oxidation of ferrous ferrocyanide salts. It has the chemical formula Feᴵᴵᴵ ₄[Feᴵᴵ ₆] ₃. Another name for the color is Berlin blue or, in painting, Parisian or Paris blue.

Feldgrau is a greenish grey color. It was the official basic color of military uniforms of the German armed forces from the early 20th century until 1945 or 1989. Armed forces of other countries also used various shades of that color.